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Pre-Listening Vocabulary revolution: to go around something (Earth revolves around the Sun.) rotation: the spinning of something (Venuss rotation is backwards.) axis: a real or imaginary line that something rotates on retrograde: in a backwards movem
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Keep Rolling Luggage Upright With Physics物理学帮你稳住拉杆箱 If you've ever pulled a rolling suitcase through the airport, chances are you've also been annoyed by this common occurrence: the suitcase starts rocking back and forth on each w
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Years Ago, The Year Was 400 Days Long 多年前，一年长达400天 Don: Yaeuml;l, do you notice the days changing length over the course of the year? 东：雅瑶，你有注意到一年中每一天的长度在改变么？ Yaeuml;l: Sure, Don, it s
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The massive earthquake that struck Chile in February 2010 might have shortened Earth's day by 1.26 microseconds, according to calculations by a NASA scientist. An EarthSky Facebook friend asked us how. And the answer is for the day to get shorter, Ea
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任何作品均有特定的文体，原文的文体不同，翻译方法也随之而异。试观察下列几个片断的原文及其译文 It appears that you've got the offer of a very good job. A wonderful job. Are you going to take it? I don't thi
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But as it grew, the Khmer Kingdom faced the stumbling block. When the monsoon finished each year, the fish and water would vanish. So each year, the inhabitants were plunged into drought and hunger. The Khmer rules off the challenge magnificently. Th
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