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[科学美国人60秒] 【整理】SSS 2009-08-24

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[科学美国人60秒] 【整理】SSS 2009-08-24

本帖最后由 yrml 于 2009-8-31 16:13 编辑

SSS 20090824

sss


Tune in every weekday for quick reports and commentaries on the world of science-- it will just take a minute.

 

A study in the Journal of Evolutionary Biology finds that many more animals have appendixes than was thought, and that the appendix is not merely a remnant of a digestive organ called the cecum. All of which means that the appendix might not be so useless. Steve Mirsky reports

 

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Two years ago, Duke University Medical Center researchers said that the supposedly useless appendix is actually where good gut bacteria safely hide out during some unpleasant intestinal conditions.

Now the research team has looked at the appendix over evolutionary history. They found that animals have had appendixes for about 80 million years. And the organ has evolved separately at least twice, once among the weird Australian marsupials and another time in the regular old mammal lineage that we belong to.

Darwin thought that only a few animals have an appendix and that the human version was what was left of a digestive organ called the cecum. But the new study found that 70 percent of rodent and primate groups have species with an appendix. And some living animals have a cecum and an appendix. If Darwin had known about species that had both organs, he probably would have revised his views of the appendix, the researchers note.

Ironically, it’s natural selection that keeps the human appendix from shrinking away completely. Because smaller ones are more likely to become infected. And keep your genes out of the pool.

Steve Mirsky

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HW
Two years ago, Duke univerity medical centers researchers said that its supposely useless appendix is actually good bacteries safely hide out during unpleasent intestinal conditions. Now the research team is looking at the appendix revolutionary history. They found that animals have appendixes for about 80 million years, the organism of all separately at least twice once among the weird Australian  mycopian other time regularal manmalin age we belonged to. Darwen thought that only a few animals have appendix and the human version was left digestable organ called cecum. But new study found 70% of * primte groups have species with appendix. And some living animals have sigma end of appendix. If Darwen had knowned about the species had both organs, he probably were advised the views of appendix researcher's note. Ironcally it is natrual selection that keeps the human appendix from trinkin away completely, because smaller ones are more likely to become infected and keep your genes out of the pool.
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  • yrml

立即获取| 免费注册领取外教体验课一节
On xiaoyingzhou

This is Scientific American's 60 seconds science. I'm Steve Mirsky. Got a minute?

Two years ago, Duke University Medical Center researcher said that the supposedly useless appendix is actually where good gut bacteria safely hide out during some unpleasant intestinal conditions. Now the researchers team has looked at appendix over evolutionary history. They found that animals have had appendixes for about 80 million years and the organ has evolved separately at least twice. Once among the wierd Australian marsupials and another time in the regular old mammal lineage that we belong to. Darwin thought that only a few animals have an appendix and that the human version was what was left of a digestive organ called the cecum. But the new study found that 70% of rodent and primate groups have species with an appendix and some living animals have a cecum and appendix. If Darwin had known about species that had both organs, he probably would have revised his views of the appendix, the researchers note. Ironically, it's natural selection that keeps the human appendix from shrinking away completely. Because smaller ones are more likely to become infected and keep your genes out of the pool.

Thanks for the minute. For Scientific American's 60 seconds science, I'm Steve Mirsky.
1

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  • yrml

实现无障碍英语沟通
本帖最后由 summer114 于 2009-8-25 09:48 编辑

HW

Two years ago, Duke University medical center researchers said that the supposedly useless appendix is actually where good gut bacteria safely hide out during some unpleasant intestinal conditions.

Now the research team has looked at the appendix over evolutionary history. They found that animals that had appendixes were about 80 million years and organs evolved separately at least twice. Once among the weird Australia Monsoupeals and another time in the regular old mamalian age that we belong to. Darwin thought that only a few animals had an appendix and that the human version was what left of a digestive organ called cigon.

But the new study found that 70 percent of rodent to primate groups have specis with an appendix. Some living animals have a cigon and an appendix. If Darwin had known about specis with both organs, he probably would revise his views about appendix the researchers note. Ironically, it's natural selection that keeps human appendix from shrinking away completely. Because smaller ones are more likely to become infected and keep your genes out of the pool.
1

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  • yrml

口译专员推荐—>口译训练软件IPTAM口译通
本帖最后由 yrml 于 2009-8-31 15:37 编辑

regular old 怎么翻译啊?
                      9楼的同学说得很对哈---yrml
HW

Two years ago Duke University Medical Center researchers said that this supposedly useless appendix is actually work good bacteria safely hide out during some unpleasant intestilock conditions. Now the research team has looked at the appendix of evolutionary history, they found that animal has had appendixes for about 80 million years and the organism has evolved separately twice, once among the wild Australian marsupials and another time is the regular mammal lineage that we belong to. Darwin thought that only a few animals have an appendix, and that the human version was what left digestive organ called the cecum. but the new study found that 70 percent of rodent and primakerps have spices with appendix and some living animals have a cecum and appendix. If Darwin had known about these spices had both organs, he probably would revise his views of the appendix the researchers note. Around this natural selection keeps this appendix from shrinking away completely because smaller ones are more likely becoming affected and keep your genes out of the pool.
1

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  • yrml

本帖最后由 彩色心情 于 2009-8-25 14:14 编辑

Homework
This is scientific America's 60 Second Science, I am Steve  Mirsky. Got a minute?
   Two years ago, Duke University medical center researcher said that  it's supposedly useless appendixes, it's actually  where good backteria safely have some unpleasant intestinal conditions.
   Now the research team has looked at  the appendix over revolutionary history. They found that animal've had appendix for about 18million years and the organize involve separately at least twice, once among the weird Austrilian  Mars Cpu and another time in the regular mammal lineaged  "we belong to".  
   Darwin thought that only a few animals have appendix  and that human version was what was left a digestive organ called the cecum. But a recent study found that 70 percent of Rogan and primier groups have species with appendix and some living animals have   ended appendix. If Darwin had know about species  have both organs, he probably would have revised his views of the appendix the researhers note.  
   Ironically it's natural slection that keep CU appendixes from shrinking away completely because smaller ones are more likely to become infected and keep your genes out of the poor.
   Thanks for the minute for Scientific America's 60 second science, I am Steve Mirsky.
1

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  • yrml

实现无障碍英语沟通
HW

This is Scientific American's 60 Seconds Science. I'm Steve Mirsky. Got a minute?

Two years ago, Duke University Medical Center researchers said that the supposedly useless appendix is actually where good gut bacteria safely hide out during some unpleasant intestinal conditions. Now the research team has looked at the appendix over evolutionary history. They found that animals have had appendixes for about 80 million years and the organ has evoved separately at least twice. Once among the weird Australian marsupials and another time in the regular old mammal age lineage that we belong to. Darwin thought that only a few animals have an appendix and the human version was what was left of a digestive organ called cecum. But the new study found that 70 percent of rodent and primate groups have species with an appendix and some living animals have a cecum and an appendix. If Darwin had known about species that had both organs, he probably would revise his views of the appendix the researchers note. Ironically, it's natural selection that keeps human appendix from shrinking away completely, because smaller one are more likely to become infected and keep your genes out of the pool.

Thanks for the minute for Scientific American's 60 Seconds Science, I'm Steve Mirsky.
1

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  • yrml

普特听力大课堂
5# summer114

相比之下普通的古老灵长类分支 regular 主要对weird嘛
1

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  • yrml

好栏目推荐之美国口语俚语
HW

Two years ago, Duke University Medical Center researchers said that the supposedly useless appendix is actually where good gut bacteria safely hide out during some unpleasant intestinal conditions. Now the research team has looked at the appendix over evolutionary history. They found that animals have had appendixes for about eighty million years. And the organ has evolved separately at least twice. Once among the weird Australian marsupials and another time in the regular old mammal lineage that we belong to. Darwin thought that only a few animals have an appendix and that the human version was what was left of a digestive organ called the cecum. But the new study found that seventy percent of rodent and primate groups have species with an appendix and some living animals have a cecum and an appendix. If Darwin had known about species that had both organs, he probably would have revised his views of the appendix, the researchers note. Ironically it's natural selection that keeps the human appendix from shrinking away completely because smaller ones are more likely to become infected and keep your genes out of the pool.
1

评分次数

  • yrml

HOMEWORK
This is scientific American, sixty second science. I'm SM. Got a minute?

Two years ago, Duke University medical centre researchers said the supposedly useless appendix is actually where good gut bacteria safely hide out during some unpleasant intestinal conditions. Now the research team has looked at the appendix over evolutionary history. They found animals have had appendix for about 80 million years and the organ has evolved separately at least twice. Once among the wired Austrilian marsupials and another time in the regular old mammal lineage that we belong to. Darwin thought only a few animals have appendix and the human version was what was left of a digestive organ called the cecum. But the new study found that 70% rodent and primate groups have species with appendix and some living animals have the cecum and appendix. If Darwin had known about species have both organs, he probably would revise his views of the appendix that the researchers note. Ironically, it's natural selection that keeps human appendix from shrinking away completely because smaller ones are more likly to become infected and keep your genes out of the pool.

Thanks for a minute for scientific American sixty second science, I'm SM.
1

评分次数

  • yrml

HW

This is Scientific American's 60 seconds science. I'm Steve Mirsky. Got a minute?
Two years ago, Duke University Medical Center researcher said that the supposedly useless appendix is actually where good gut bacteria safely hide out during some unpleasant intestinal conditions. Now the researchers team has looked at appendix over evolutionary history. They found that animals have had appendixes for about 80 million years and the organ has evolved separately at least twice. Once among the wierd Australian marsupials and another time in the regular old mammal lineage that we belong to. Darwin thought that only a few animals have an appendix and that the human version was what was left of a digestive organ called the cecum. But the new study found that 70% of rodent and primate groups have species with an appendix and some living animals have a cecum and appendix. If Darwin had known about species that had both organs, he probably would have revised his views of the appendix, the researchers note. Ironically, it's natural selection that keeps the human appendix from shrinking away completely. Because smaller ones are more likely to become infected and keep your genes out of the pool.
Thanks for the minute. For Scientific American's 60 seconds science, I'm Steve Mirsky.
1

评分次数

  • yrml

凤兮凤兮思高举,世乱时危久沉吟;
龙兮龙兮风云会,长啸一声抒怀襟。
每天半小时 轻松提高英语口语
HW
This is Scientific American's 60 seconds science. I'm Steve Mirsky. Got a minute?

Two years ago, Duke University Medical Center researcher said that the supposedly useless appendix is actually where good gut bacteria safely hide out during some unpleasant intestinal conditions. Now the researchers team has looked at appendix over evolutionary history. They found that animals have had appendixes for about 80 million years and the organ has evolved separately at least twice. Once among the wierd Australian marsupials and another time in the regular old mammal lineage that we belong to. Darwin thought that only a few animals have an appendix and that the human version was what was left of a digestive organ called the cecum. But the new study found that 70% of rodent and primate groups have species with an appendix and some living animals have a cecum and appendix. If Darwin had known about species that had both organs, he probably would have revised his views of the appendix, the researchers note. Ironically, it's natural selection that keeps the human appendix from shrinking away completely. Because smaller ones are more likely to become infected and keep your genes out of the pool.

Thanks for the minute. For Scientific American's 60 seconds science, I'm Steve Mirsky.
1

评分次数

  • yrml

Live free, die well.
on  amypeipei

This is scientific Americans 60 seconds science. I'm SM. Got a minute?

Two years ago, Duke University medical centre researchers said the supposedly useless appendix is actually where good gut bacteria safely hide out during some unpleasant intestinal conditions. Now the research team has looked at the appendix over evolutionary history. They found animals have had appendix for about 80 million years and the organ has evolved separately at least twice. Once among the wired Austrilian marsupials and another time in the regular old mammal lineage that we belong to. Darwin thought only a few animals have appendix and the human version was what was left of a digestive organ called the cecum. But the new study found that 70% rodent and primate groups have species with appendix and some living animals have the cecum and appendix. If Darwin had known about species have both organs, he probably would revise his views of the appendix that the researchers note. Ironically, it's natural selection that keeps human appendix from shrinking away completely because smaller ones are more likely to become infected and keep your genes out of the pool.

Thanks for a minute for scientific American sixty seconds science, I'm SM.
1

评分次数

  • yrml

口译专员推荐—>口译训练软件IPTAM口译通
本帖最后由 yrml 于 2009-8-31 15:40 编辑

in the regular 吗?
我怎么听了几遍都是irregular呢?
拜托大家再看看
          应该是in the regular哈---yrml
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