单词：bimolecular acid-catalyzed alkyl-oxygen cleavage
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Acid Rain 酸雨 Damage from acid rain is widespread - not just in eastern North America, but throughout Europe, Japan, China, and Southeast Asia. Is the rain that's falling on your umbrella acidic? A listener's question -- on today's Earth and Sky. J
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要是今天你想来美国大采购，你该学会哪些简单的对话呢？这次我挑选的这个主题买衣服，就是要告诉各位，有哪些会话是在买衣服的场合会用到的，从随
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Well you know the employers across the country have embraced casual Fridays. And many employees are happy to partake. But how casual is too casual? From open toes to exposed flesh, extreme dressing down can be a job hazard and there are some rules t
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Item eight. Vocabulary. fossil, molecule, hydrogen, carbon, sulfur. Petroleum has been important since ancient times. In Latin, the name means rock oil. Petroleum is a fossil fuel. The liquid comes from the remains of plants and animals that died mil
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Section A: （保留原书内容，跟着音频君边读边记忆，体会单词的发音和用法） 1. altercation n. 争吵 The teacher halted the altercation by separating the two opponents before they could come to blows. 老师在敌对的双方互
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[00:00.00]What Makes a Teacher 为师之道 [00:04.63]It is customary for adults to forget how hard and dull and long school is. [00:11.85]The learning by memory of all the basic things one must know [00:15.45]is a most incredible and unending effort. [
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How does acid deposition affect human health? We eat food, drink water, and breathe air that has come in contact with acid deposition. Canadian and U.S. studies indicate that there is a link between t
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Part 4 Air Pollution 空气污染 Air is the ocean we breathe. Air supplies us with oxygen which is essential for our bodies to live. Air is 99.9% nitrogen, oxygen, water vapor and inert gases. Human activities ca n release substances into the air, some
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This is Scientific Americans 60-Second Science, Im Steve Mirsky. Got a minute? The 2010 Nobel Prize in Chemistry goes to the University of Delawares Richard Heck, Purdues Ei-ichi Negishi and Hokkaido Universitys Akira Suzuki for their work in develop
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Can Folic Acid Prevent Childhood Autism? From VOA Learning English, this is the Health Report in Special English. A new study found that women who took folic acid supplements in early pregnancy were less likely to have a child with autism. Folic acid
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AS IT IS 2016-02-13 Work Soothes Pain of Acid Attacks In India A caf in India is hiring women who once stayed in hiding after being attacked with acid. One woman, Dolly Kumari, says she stayed inside for two years after a man threw acid on her. He wa
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Magnetic Ring Used to Stop Acid Reflux Heartburn is usually linked to gastric acid that reaches the esophagus when a weak muscle does not close as it should after swallowing. When stomach juices back up into the esophagus, the acid can cause a burnin
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By Birungi Machrine Kampala 26 November 2007 Attacks using acid are becoming more frequent in Uganda. Up to 2003, there were only 145 recorded attacks, but over the last three years, there have already been 87. Survivors often suffer from severe emot
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英语学习笔记： browse v. 浏览；随意观看 cleavage n. 分裂；劈开；乳沟 alteration n. 改变；变更 vest n.背心；内衣 I'm just browsing. 我只是随便看看。 I don't like too much cleavage. 我不喜欢太暴露。 I don
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新娘的婚纱不仅可以端庄典雅，也可以前卫性感，在纽约婚纱时装周上，裸露成为各大知名婚纱礼服品牌的主打风格，这样的婚纱绝对让新娘子的回头率爆表。 Whether they opt for a satin, ivory or
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如何驾驭打折的诱惑 如果你喜欢自己慢慢淘，那就婉拒热心的店员： I'm just browsing。 I'm just looking。 我只是随便看看。 如果你是忙到连逛街时间都没有的人，那就讨好店员吧： Could you help m
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Topic1 How to Succeed in Business Without Really TryingIs there a way to succeed in one's career without working hard? This sounds like a no brainer as most people would say no. But according to a Broadway musical, there is. The musical is called How
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