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  3. It is natural to assume that as the Sun grows older, and uses up its hydrogen fuel—which it is now doing at the spanking rate of

It is natural to assume that as the Sun grows older, and uses up its hydrogen fuel—which it is now doing at the spanking rate of

admin2012-08-03  84
问题 It is natural to assume that as the Sun grows older, and uses up its hydrogen fuel—which it is now doing at the spanking rate of half a billion tons a second—it will become steadily colder and redder.
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答案很自然会想到，随着太阳的老化及氢燃料的日益耗用(目前它上面的氢燃料正在以每秒5亿吨的惊人速度燃烧着)，太阳将会不断地变冷、变红。
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