只用一本书提高英语听力能力!重温经典名著双语阅读小编推荐:跟着纪录片学英语不背单词和语法,轻松学英语
返回列表 回复 发帖

[自然百科] 2014-11-13 啤酒是如何酿成的—13

提高英语听力能力 找对方法很重要!
The word yeast comes from the old English word, meaning,bubble,oil and foam. Fitting that is an essential engridient in one of the world favorite frossy drinks.The last big step in making beer is fermentation, a process that many see as where magic happens.Sugars from the malt are metalbolized into alchol, a natural process that occurs completely on its own.It's an active nature that's mistified the people since the beginning of the time. The fermentation process is like something of other world the way because it just hapens by itself. You can't see the yeast thanks to the bubbling,the churning and the so forth,this has been incorporated in religion.So how on the world is the process of fermentation trigured by yeast cells.Molecues of glucose,or sugar enters the yeast cells through difussion.The yeast breaks down the sugar,which in turn supplies more energy to the yeast,allowing it to continue to reproduce and can bust the remaining glucose molecues into carbodioxide and ethanol, the alchol in beer,
返回列表