单词：diaminocyclohexyl
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This is Scientific American's 60-Second Science. I'm Karen Hopkin. This will just take a minute. As Valentines day approaches, remember, its the thought that counts. Just ask a decorated cricket. Because according to a study published in the January
Scientific American(一)月
Cloze: Stingers of the Sea 海中刺客 ── 水母 Given impressive-sounding names like Portuguese man-of-war, jellyfish are certainly respected and feared by humans. Not exactly a fish, and lacking a spine, this creature has a single body cavity
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Jonah Hex. Are these the boys you wanted? You surely have done us quite a favor. A transaction is all it was. I'll collect my hundred dollar bounty on them and be on my way. From Superman and Spider Man to Josie and the Pussycats, Hollywood has a lon
VOA标准英语2010年(六)月
Oum Sok began working as a cyclo driver when he was 18. He says the city has become very expensive over the years, making it much harder to earn a living. New York has its yellow cab. London has its red bus. But Phnom Penh has its cyclo - a three-whe
VOA标准英语2010年(六)月
The State Department said Thursday an agreement for the start of direct peace talks between Israel and the Palestinians is close to completion. The deal will apparently be sealed by statements from the United States and the International Middle East
VOA标准英语2010年(八)月