单词：cascade concentration plate
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The theory of plate tectonics describes the motions of the lithosphere, the comparatively rigid outer layer of the Earth that includes all the crust and part of the underlying mantle. The lithosphere(n.[地]岩石圈)is divided into a few dozen plates o
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Psychologically defined, concentration is the process of centering one's attention over a period of time. In practical application, however, concentration is not as simple to deal successfully with as the definition may imply. For this reason, it is
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今天还是要继续讲两个在大选期间新闻界常用来报道选战形势的习惯用语。你知道哪一种运动是美国人日常用语最丰富的源泉呢？是美国最风行的球类运动：棒球。今天要说的两个习惯用语都
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在美国每年棒球季节的第一场比赛相当于春天来临的信息。说真的，这一百多年来最得美国大众青睐的运动就是棒球，而棒球运动也成了习惯用语的丰富来源。我们今天就专讲一些出自棒球运
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[ti:UNIT 4 Look into Science! Lesson 28: Fill My Plate] [0:00.567]UNIT 4 第四单元 [0:02.629]Look into Science! 走进科学！ [0:04.999]Lesson 28: 第28课： [0:07.524]Fill My Plate 把我的盘子装满 [0:15.770]It's time for lunch! 该吃午饭
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The United States is warning Honduras that there will be a cascade of negative consequences for the Central American state if the coup that ousted elected President Manuel Zelaya on Sunday is not reversed. The Obama administration is backing mediati
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