单词：phenylisothiocyanate(PITC)
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[00:01.43]Shelly to Elizabeth Hitchener [00:03.94]Your letter of the 1st hath this moment reached me. [00:08.43]I answer it according to our agreement, [00:11.06] which shall be inviolable. [00:13.35]Truly did you say that, at our arising in the morn
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This is Scientific Americans 60-Second Science. Im Steve Mirsky. Got a minute? To keep your car purring, you have to change the oil. Such maintenance produces eight billion gallons of used motor oil annually. Some waste oil does get re-refined to pro
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说一口流利的英语，从简单的单词开始。 听听，读读，背背，今天你的词汇量又增加了5个。 单词/词义 中英例句 单词听读 lonely [ 5lEunli ] Working as a writer can be a very lonely existence. adj. 寂寞的 当作家会是一种很寂莫的生涯。 neighbor [ 5neibE ] My next
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This is Scientific American's 60-Second Science. I am Steve Mirsky.Got a minute? Talk about your vicious cycles. A new study finds that belly fat could be making you hungrier. Which would lead to more belly fat. The research was performed at the Univ
Scientific American(四)月
Algae seem harmless enough. These precursors to plants thrive throughout the world's waters. But these single-celled plants have global consequences. We can thank them for oxygen in the atmosphere, oil in the lithosphere as well as dead zones in the
Scientific American(十一)月
Sonja Pace Israeli troops are continuing their controversial military operation in Rafah, in the southern Gaza Strip, despite both international condemnation and domestic criticism. The Gaza operation
VOA2004（上）--国际时事