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[科学美国人60秒] 【整理】SSS 2009-01-09

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This is Scientific American's 60-Second Science. I'm Karen Hopkin. This will just take a minute.

 

Have you ever turned off your lights and heard"wu~~". To you it's a sound that signals bites in the night. But to a male mosquito it's a love song,produced by a female seeking a mate. Now scientists in Cornell University find that males who answer that call join in the serenade. And two sing in harmony as they check each other out. Working with Aedes aegypti mosquitos - the pest that carry dengue fever- the scientists tethered individuals to a special insect pin and allowed them to fly pass potential mate. They found they females on their own whine at a frequency of 400 Hz. Whereas single males buzz about 600. But the two come together,they perform a duet in which the beat of their wings reaches a frantic 1200 Hz. Isn't it beautiful? Mosquitoes seem to think so. Which is a surprise, because reseachers had previously thought that female mosquitoes are deaf. But the Cornell scientists found that mosquito ears are good up to 2000Hz, results pubilished in January 9th issue of Science. Maybe that hamonizing could be exploited for controlling mosquito populations. Releasing into the wild males that can't sing could be a real buzz-kill.

 

Thanks for the minute,for Scientific American's 60-Second Science, I'm Karen Hopkin.

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  • ivyxk

HOMEWORK

This podcast is brought to you by scientific american’s,instant egghead guide to the mind,for more infomation,go to instant egghead.com

 

this is scientific american’s ,60s science,i'm karen hopkin,this'll just take a minute.have you ever turned off your lights and heard ~~~~~~~ to you it’s a sound that signals bites in the night,but to male mosquito ,it's a love song produced by a female seeking a mate. now scientist from cornell university find that males who answer that call join in the serenade,and the two sing in harmony as they check each other out.working with aedes aegypti mosquitoes,the pests that carry dengue fever,the scientists tethered individuals to special insect pin,and allow they to fly past a potential mate.they found a female on their own whine at a frequency of 400 hertz whereas a single buzz at about 600 .but when the two come together ,they perform duet in which the beat of their wings reaches a frantic 1200 hetz.isn't it beautiful?mosquitos seem to think so,which is a surprise because researchers had previously thought that female mosquitos were deaf ,but the cornell scientists found that the mosquito ears are good upto 2000 hertz,results published in the january 9th issue of science. maybe that harmonizing could be to exploited for controlling mosquito populations.releasing into the wild males can't sing could be a real buzz kill.

 

thanks for the minute for scientific american’s 60s science.I'm Karen Hopkin.

 

vocabulary:

egghead n. 有知识的人,受过高等教育的人,理论家

aedes n. 豹脚蚊[ei'i:di:z]

dengue n. 登革热['deŋgi]

whine n. 抱怨,牢骚,哀鸣vi. 哭诉,发牢骚,发呜呜声vt. 哀诉

duet n. 二重奏[dju:'et]

frantic a. 狂乱的,疯狂的['fræntik]

exploit vt. 剥削,开发,利用n. 功劳,功绩,功勋

 

PS:头一次来PUT听写,看到大家都好强喔~希望同学们多多指点~~

 

我在WORD上用红色标住了,可是粘过来就没了,下次好了~一起加油~

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Homework

  This podcast is brought you by Scientific American Instant Egghead Guide to the Mind. For more information, go to ‘instant egghead.com’.

  This is Scientific Americans 60-second Science. I’m Karen Hopkin. This will just take a minute.

   Have you ever turned off your lights and heard-(BUZZING)? To you, it’s a sound that signals bites in the night, but to a male mosquito it’s a love song produced by a female seeking a mate. Now scientists in Cornel University find that males who answer that call join in the serenade. And the two sing in harmony as they check each other out. Working with Aedes aegypti mosquitoes, the pests that carry dengue fever, the scientists tethered individuals to a special insect pin and allowed them to fly past a potential mate. They found that females on their own, whine at a frequency of 400 hertz. Whereas a single male buzzed about 600. But when the two come together, they perform a duet in which their beat of their wings reaches to a frantic 1200 hertz. Isn’t it beautiful? Mosquitoes seem to think so, which is a surprise because researchers had previously thought that female mosquitoes were deaf. But the Cornel Scientists found that mosquito’s ears are good up to 2000 hertz. Results published in the January 9th issue of Science. Maybe that harmonizing could be exploited for controlling mosquito populations. Releasing into the wild males that can’t sing could be a real buzz-skill.

  Thanks for the minute. For Scientific Americans 60-second Science, I’m Karen Hopkin.

[ 本帖最后由 maixianliu 于 2009-1-31 22:39 编辑 ]
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