单词：halogen acetone
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Simple New Test Detects Early Signs of Diabetes 新型简单测试或能检测出糖尿病早期迹象 People with Type 1 diabetes, usually diagnosed in children and young adults, must take insulin injections and watch their diet to keep their blood
发表于:2018-12-16 / 阅读(132) / 评论(0)
VOA标准英语2015年(一月)
VOA标准英语2015年(一月)
Air pollution outside is easy to spot, hanging over the city, or sputtering from a tailpipe. But there's lot of indoor air pollution, too, even if it's not as obvious. It's caused by volatile organic compounds, or VOCs. They can come from building ma
发表于:2018-12-24 / 阅读(173) / 评论(0)
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2016年Scientific American(八)月
Hard bargainers VS. soft bargainers Dialogue 1 A: We've got a problem...it looks like we'll need more spotlights on the exhibition booth. The client thinks it's too dark,and they want to add halogen lighting. We've already got 3 sets of track lighti
发表于:2018-12-31 / 阅读(147) / 评论(0)
商务英语口语
商务英语口语