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获得此前未获得过的图像
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在英语学习中,英语词汇学习是一门重要的必修课,免费在线学习天文学的英文、天文学用英语怎么说,最专业的词汇学习资源助你轻松成为外语达人
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An asteroid (2010 SO16) has been discovered that has trailed the Earth in an almost identical orbit to ours for a quarter-million years. Karen Hopkin reports When you hear about asteroids close ...
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Imagine a pinball machine on multi-ball mode—only the balls are the size of planets. The early solar system was such a rough-and-tumble place. That ____1____ environment produced the occasional...
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Imagine a pinball machine on multi-ball mode—only the balls are the size of planets. The early solar system was such a rough-and-tumble place. That ____1____ environment produced the occasion
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Galileo first ______1_____ Saturn’s rings 400 years ago. But since then, scientists have ______2_____ how they got there. Because the rings are almost pure water ice—and material in the outer s...