音标:[prәu'enzaim] ;
n. 酶原
[化] 酶原
n. any of a group of compounds that are inactive precursors of enzymes and require some change (such as the hydrolysis of a fragment that masks an active enzyme) to become active
词型变化:名词复数形式 : proenzymes
【近义词】

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发表于:2018-12-04 / 阅读(167) / 评论(0) 分类 英文魔法师字源大挪移

Combat Dark Under Eye Circles 01 战胜黑眼圈 01 对付黑眼圈的方法 土豆泥能够减轻黑眼圈。土豆含有邻苯二酚酶,化妆品中用它作为美白皮肤的物质。 把一个土豆在食物加工机中绞碎,然后将生土豆泥包裹在一块奶酪布里。 把包有土豆泥的布敷在眼睛下方,持续15至20分钟

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By Mike O'Sullivan 27 July 2007 United Nations Secretary-General Ban Ki-moon is on a two-day visit to California to discuss climate change and other global challenges. Mike O'Sullivan reports from San Francisco, the secretary-general says the United

发表于:2018-12-08 / 阅读(216) / 评论(0) 分类 2007年VOA标准英语(七月)

Have you ever thought about your biological clock? Never! No. Men don’t have to think about that. Men may not think about their biological clocks, but they should. There are some men whose biologica

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[00:17.36]Figure On The Proch [00:26.40]门廊鬼影 [00:36.51]Back in the early 1980s my aunt lived in a house [00:41.27]that was literally located in the middle of nowhere. [00:46.05]It used to really creep my younger brother and me out, [00:50.28]but

发表于:2018-12-11 / 阅读(148) / 评论(0) 分类 英语灵异故事

[00:17.23]Figure On The Proch [00:26.43]门廊鬼影 [00:35.14]I lay back down and tried to go back to sleep. [00:39.57]After I had lain there for about 5 minutes, [00:43.12]I started to hear a tapping sound. [00:45.77]I listened for a minute, [00:48.07]

发表于:2018-12-11 / 阅读(186) / 评论(0) 分类 英语灵异故事

You know, I just wanna say one brief thing about something the previous speaker said. I didn't wanna spend too much time on that 'cause I don't think it's important enough. But one thing is worth considering. He's the -- He's the nominal head of an

发表于:2018-12-30 / 阅读(177) / 评论(0) 分类 名人演讲

This is Scientific American's 60-Second Science. I'm Steve Mirsky . Got a minute ? Germanys Harald zur Hausen and Frances Luc Montagnier and Francoise Barre-Sinoussi share the 2008 Nobel Prize in Physiology or Medicine, awarded October 6th. Barre-Sin

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This is Scientific American's 60-Second Science. I'm Christie Nicholson . Got a minute? Altruism poses a problem for the theory of survival of the fittest. If we help others at a cost to ourselves, nice-guy behavior should die out, because we are giv

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This is Scientific American's 60-Second Science. I'm Christie Nicholson. This will just take a minute. So check this out: Hi my name is Adi Rajagopalan, I'm going on 18 in a few days, and my project was Modelling Synergistic Cellulolytic-Hemicellulol

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And now for Money Myths, a new feature from Michelle Singletary. She is Day to Days personal finance contributor, and a regular Tuesday guest. And as the title implies, Michelle will try to correct some financial myths we all may have. She spoke ear

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Larry到李华住的地方,去看她新领养的猫咪小雪球。今天李华会学到两个常用语:mental和pro. LL: Snowball is adorable! She's so little and fluffy! LH: 就是啊,我的猫咪

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By Peter Fedynsky Washington, D.C. 19 February 2007 watch Appropriations report On the same day that the U.S. House expressed its disapproval of sending more troops to Iraq, the White House asked lawmakers to approve additional money for Iraq's econ

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发表于:2019-01-26 / 阅读(137) / 评论(0) 分类 经济学人商业系列

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发表于:2019-02-12 / 阅读(122) / 评论(0) 分类 VOA标准英语2009年(十一月)

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发表于:2019-02-22 / 阅读(163) / 评论(0) 分类 2018CRI中国国际广播电台
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