单词：TIRFS
[=total internal reflection fluroescence spectroscopy]全内反射荧光分光镜法
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Besties, Buds, BFFs ... Friends! Now, the VOA Learning program Words and Their Stories. Language changes over time. Many words and expressions have changed over the centuries. But the word friend has stayed the same. It is a rare example in the Engli
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LONDON, Jan. 7 (Xinhua) -- English soccer club Manchester（曼彻斯特 ） City confirmed on Friday that they have signed striker Edin Dzeko from Wolfsburg for 27 million pounds (42 million U.S. dollars). The 24-year-old Bosnian has agreed to a fou
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