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关注:1
2013-05-23 12:21
求翻译:In space,why can an object the size of a nickel pack the same wallop as a going 80 kilometers per hour?是什么意思?![]() ![]() In space,why can an object the size of a nickel pack the same wallop as a going 80 kilometers per hour?
问题补充: |
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