单词：adjustable potential offset
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Unit 4 When was it invented? [00:07.36]Section A [00:09.76]Language Goal [00:11.54]Talk about inventions [00:14.31]1a GROUPWORK [00:17.59]Look at the things below. [00:20.27]In what order do you think they were invented? [00:24.94]Number them [1-5] (
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'Part-Time Scientists' Try to Put Vehicle on Moon 兼职科学家为将探测车送上月球进行竞争 Sixteen teams from around the world have set their sights on the moon. The teams are also hoping to win the $30 million Lunar XPRIZE. Google, the
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This is the VOA Special English Economics Report. As the American housing market has cooled, worries about investments based on risky home loans have heated up. Last month, two hedge funds operated by the investment bank Bear Stearns nearly collapsed
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自拍是普通人最喜欢的一种消遣方式，而目前有一种提升自拍效果的新神器正迅速成为我们大家生活的一部分。它就是selfie stick（自拍杆）。 A selfie stick is a monopod used to take selfie photographs by
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LONDON, Nov. 3 (Xinhua) -- Weight loss surgery could reduce the risk of developing type 2 diabetes by around 80 percent in obese people, according to a new research published Monday in the British medical journal The Lancet Diabetes Endocrinology. Us
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