链传动机构

科学美国人60秒 SSS The True ＂Bottom＂ of the Food Chain Is Plenty Polluted

The Mariana Trench is the deepest spot in the worlds oceans. Only three humans have ventured into the trench in submersibles. But plenty of our pollution has made the voyage to the bottom of the sea: a new study finds that critters living more than s

发表于:2018-12-24 / 阅读(29) / 评论(0)

2017年Scientific American(二)月

CNN 2010-02-09

The Toyota tribulations. If you own one, you almost have to be wondering, what the heck is next? Crisis of confidence clouded by confusion. Now the Prius has a huge problem. Toyota says that a glitch in the electronic brakes could cause a delay when

发表于:2019-01-07 / 阅读(69) / 评论(0)

CNN2010年(二)月

学个词Learn a Word 第1741 chain

今天我们要学的词是 chain。Chain 除了大家都知道的，有锁链的意思，还有连锁店的意思。The American drug store Walgreens became the first retail store chain to expand its services to include diagnosing and treating patie

发表于:2019-01-09 / 阅读(102) / 评论(0)

英语单词荟萃

Horse meat found in pasta of German supermarket chain

COPENHAGEN, Feb. 18 (Xinhua) -- German supermarket chain Lidl in Denmark has found traces of horse meat in a pasta dish, the supermarket annouced late on Monday. A pasta dish called Combino Penne Bolognese from the manufacturer Copack has been found

发表于:2019-01-09 / 阅读(83) / 评论(0)

英语新闻

VOA标准英语2011--Palestinians Won't Stop Statehood Drive

PalestiniansWon'tStopStatehoodDrive The Palestinians are taking their statehood bid to the United Nations this week. Palestinian leaders plan to ask the world body for full status as a state, though that has already been assured a block by the United

发表于:2019-01-13 / 阅读(35) / 评论(0)

VOA标准英语2011年(九月)

【英语趣味课堂】海龟-Sea Turtles

Mike: So Dusty, your background is in Marine Biology. Is that right? Dusty: Yes. Mike: You're kind of a marine biologist. Dusty: Mm-hm. Mike: You've mentioned before yesterday, we're at the aquarium, you mentioned that you've done work with sea turtl

发表于:2019-01-25 / 阅读(25) / 评论(0)

英语趣味课堂

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adaptive estimation system