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过去将来完成进行时指动作持续到过去某时后的另一时刻且进行下去，常用结构为would/should have been doing。例如： A: What would John have been working on after 11pm last Thu evening? 约翰上周四晚11点后将一直
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because usability studies tend to be very vertical. 因为可用性研究是垂直的。 A study might ask，What do you think of this particular feature? 一项调查可能会问：您认为此特性如何？ But its not easy to ask, What do you thi
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Many South Korean families spend thousands of dollars a year on English language education for their children. Students attend private academies(学院) often until late at night everyday. Most such schools hire teachers from abroad, but a team of en
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This year's Summer Davos wraps up in the city of Dalian Friday afternoon. Our reporter Luo Yu caught up with Sebastian Buckup, Head of Programming with the World Economic Forum, at the closing ceremony. He talks about what he thinks of this year's co
2015CRI中国国际广播电台