单词：divinyl-benzene
单词：divinyl-benzene 相关文章
Transcript OK. Well I wanna talk about vinyl. Hmmwhy play it cause I dont have a record player. But well Im sat here which you cant see, but Im sat there you go, when I hear it, it will be worth it. here holding a new record. Everyone just laughed at
我想说 I Wanna Talk
Vinyl Making a Record Comeback A technology thought to be obsolete only 10 years ago is making a surprising comeback. Like the fountain pen and the film camera, the vinyl phonograph record was thought to be a thing of the past. But not so, says Steve
VOA常速英语2013年(九月)
This is Scientific Americans 60-Second Science. Im Sophie Bushwick. Got a Minute? What's the best way to find out if an unknown mixture contains a specific substance, like an environmental contaminant? You could use an expensive, bulky gas chromatogr
Scientific American(八)月
Vinyl Records Making Comeback Vinyl records were the main format for commercial music distribution in the 20th century. But the big black disks, called LPs, nearly disappeared after audio cassettes and then digital media, like CDs and MP3s, took thei
VOA标准英语2011年(九月)
Indoor air pollution is a common threat to human health, the new study looked at five common house plants and found that when it comes to removing harmful chemicals from the air, those five plants are better than others. 室内空气污染对人类健康
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本期内容： A humble houseplant with a dash of rabbit DNA could help lower our exposure to indoor air pollution, new research suggests. Scientists have revealed that by inserting a rabbit gene into devils ivy the plant is able to clean the surrou
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