聚氯乙烯树脂

【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(164) / 评论(0)

英语时差8，16

VOA标准英语2011--Study Finds High Levels of BPA in Canned

StudyFindsHighLevelsofBPAinCannedFoodforKids The industrial chemical BPA has been used to make hard plastic bottles and the lining of food cans for decades. After studies indicated that the chemical could play a role in cancers, heart disease and abn

发表于:2019-01-13 / 阅读(139) / 评论(0)

VOA标准英语2011年(九月)

TED演讲:什么会导致口臭(1)

There is a curse that has plagued humanity since ancient times. 从古代起就有一种诅咒一直让人类饱受折磨。 The Greeks fought it by chewing aromatic resins, while the Chinese resorted to egg shells. 古希腊人通过咀嚼芳香树脂

发表于:2019-01-17 / 阅读(170) / 评论(0)

TED演讲教育篇

新买的衣服穿之前要洗吗？

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(186) / 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(176) / 评论(0)

VOA标准英语2010年(五)月

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15-mer-polylysine

accounting for estate income

ahls

aileus

Allium cepa aggregatum