单词:cellulose acetate sheet spectacle frame
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[00:01.04]王迈迈英语A级考试全真模拟试卷与详解 Test Eleven [00:03.09]Part I Listening Comprehension [00:07.31]Directions: [00:08.92]This part is to test your listening ability. [00:11.53]It consists of 3 sections. [00:14.31]Section A [00:16.12]This s
β-Amyrin β-香树脂醇 α-Amyrin acetate α-香树脂醇乙酸乙酯 β-Amyrin acetate β-香树脂醇乙酸乙酯 β-Amyrin palmitate 棕榈酰β-香树酯 Anabasine 毒藜碱 Anagyrine 臭豆碱,安
This is Scientific American's 60-Second Science. I'm Cynthia Graber. This'll just take a minute. It sounds like something out of a bad science fiction novel. During World War II, a fungus called Tricoderma reesei ate its way through US military unifo
Scientists in Brazil are turning fruit fibers into car parts. At a recent meeting of the American Chemical Society, the researchers described their work in making the next generation of automotive parts made from natural fibers from bananas, pineappl
Turning Cigarette Butts to Batteries 烟头转变成电池 If you see a person carelessly throw a cigarette to the ground, what are you likely to think? That depends. If you hate people throwing things on the ground, you might think, That person shou
By Suzanne Chislett London 22 January 2008 When people are asked to picture Africa, they often speak of famine, war, deserts and jungles. Now a touring stage show in Britain is trying to shake up those ideas and reveal an entirely different side of t