ok, i think the problem arises when you use m and ms.
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送交者: Enlighten 于 2008-01-11, 11:07:13:
回答: i'm not sure. but i think you can't say 由 Enlighten 于 2008-01-11, 11:04:17:
the original data are measured in km and s, by converting that to m and ms, you implicitly increased the level of precision. so i guess we have to stick to the orignal units, km and s.
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