酮类树脂

ketone resins的用法和样例：

例句

The resins were used to turn out millions of helmet liners.用这类树脂生产了成百万只钢盔内衬。
The rosin modified phenolic resin, a mainly important one among all resins used as bands for offset inks, has the call for printing ink.松香改性酚醛树脂是平版油墨用连接料树脂的主要代表，也是印刷油墨中用量最大的一类树脂。

【英语时差8,16】回收塑料

Recycling Plastics When plastic containers are recycled, they are first cleaned, then ground into tiny pellets and put into a flotation tank. This separates out the various plastic resins from other waste material. Once they are separated out, the pl

发表于:2018-12-27 / 阅读(97) / 评论(0)

英语时差8，16

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That dress looks perfect right off the rack, and that crisp button-down shirt is never going to be any brighter or whiter than the moment you buy it. So is it really necessary to go to all of the trouble of washing those brand-new garments before you

发表于:2019-01-20 / 阅读(107) / 评论(0)

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VOA标准英语2010年-Airport Screening Technology Could Unl

Preserved bodies help doctors understand diseases that have plagued humans for thousands of years Naomi Seck | Washington, DC 05 May 2010 Scientists say looking back can help them look forward, by revealing how the disease evolved over time. Related

发表于:2019-02-05 / 阅读(122) / 评论(0)

VOA标准英语2010年(五)月

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学英语单词

aeronomical

airborne early warning