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And the only reason the coins in the funnels (or satellites around the earth) eventually DO spiral in to their doom is because they lose energy to friction and thus shift down from one stable orbit to another, until eventually, their orbit coincides with the ground. Which is called crashing.
而且，这些漏斗中的钱币（或者类似地球周围的人造卫星），最终将进入"螺旋宿命"的唯一原因就是由于摩擦力造成动能损失，不断地从一个稳定的轨道移转到另一个趋向中心的轨道，最终，它们的轨道与中心相互重迭，然后发生也就是我们所谓的"坠毁"。
《TOFEL（无字幕版）》《托福学习视频》
双语例句
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The exhibition coincides with the 50th anniversary of his death.
展会与他50周年忌辰同日。
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The present position of the house coincides with that of an earlier dwelling.
这栋房子现在的位置恰与原住宅的位置一致。
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The zone of massive sterility coincides geographically, grosso modo, with the regions in central Congo
大范围不育区在地理条件上大体上和刚果中部地区一致。
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The new energy battery without mercury and cadimium coincides with the development trend of the global battery industry.
不含汞和镉的新能源电池符合全球电池行业的发展趋势。
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Your idea coincides with mine.
我们的想法不谋而合。