单词：hard (carbon) black
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Lesson 4 Black-lead 第四课 黑铅 What is the black-lead in your pencil made of? If you take a bit of the metal which we call lead, you will find that it is grey in colour, very heavy, and not at all like the black-lead in your pencil. But the lea
英国学生科学读本
This is Scientific American's 60-Second Science. I'm Amy Kraft. Got a minute? Out of control drivers aren't the only thing city cyclists have to worry about. New research suggests that cyclists are at increased risk of lung damage because of soot. A
Scientific American(九)月
导购口语: I'd like to see the Apple computers. Do you have? 我想看看那苹果公司生产的电脑，有吗？ My office needs two copy machines. 我办公室需要2台复印机。 Here's a list of the items I want for my office: two boxes of
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蕾哈娜新专辑二单 Rihanna - Hard Rihanna featuring Jeezy Hard是Rihanna新专辑《Rated R.》中的第二支单曲，在最新的美国单曲榜上排名第九。 Yeah Yeah Yeah Yeah Yeah Yeah Yeah Yeah Yeah Yeah Yeah Yeah Yeah Yeah Yeah Oh Y
好听的英文歌曲
The Minister of Climate Change, Nick Smith, gave some strange information about our carbon emissions yesterday. (See September 23rd 2008 for information about the Emissions Trading Scheme.) Last year we put too much carbon into the atmosphere and wou
新西兰英语
本期内容： Couldchipfathelpdirtyshippingcleanupitsact? Theglobalshippingindustryisasbigacontributortogreenhousegasemissionsasaviation, andtheheavyfueloilthatpowersitsgiantvesselsisexceptionallydirty-packedwithsoot, blackcarbonandsulphur.InSeptem
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