单词：fumed silica
单词：fumed silica 相关文章
[00:15.54]The Hook [00:20.94]铁钩 [00:32.29]Maybe we should get out of here, she said. [00:35.55]That Hook Man sounds dangerous. [00:38.28]Awe, c'mon babe, it's nothing, [00:41.33]her boyfriend said, trying to get in another kiss. [00:45.72]She pushe
英语灵异故事
Plant Self-defense Plants may appear to be helpless in the face of hungry,toothy animals but many plants have evolved interesting systems of self-defense. Coarse meadow grasses are a good example. If you run your finger along a blade of coarse grass,
英语听力文摘 English Digest
AS IT IS 2015-07-14 Silica Sand Mining Worries Communities 美国硅砂矿引发社区担忧 The United States is increasing production of oil and natural gas through a process known as fracking. This process is sometimes called hydraulic fracking be
2015年VOA慢速英语(七)月
AILSA CHANG, HOST: Despite mounting evidence and a stream of dire warnings, federal regulators and mining companies failed to protect coal miners from toxic dust. MARY LOUISE KELLY, HOST: NPR and the PBS series Frontline spent more than a year lookin
2018年NPR美国国家公共电台12月
One Sunday morning Jobs brought his father to see the factory. 一个周日的早晨，乔布斯把自己的父亲带到了工厂。 Paul Jobs had always been fastidious about making sure that his craftsmanship was exacting and his tools in order, 保罗
乔布斯传
My grandmother was an iron-willed woman, the feared matriarch of our New York family back in the 1950s. When I was five years old, she invited some friends and relatives to her Bronx apartment for a party. Among the guests was a neighborhood big shot
英语美文