NASA paid dearly for that.....
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送交者: 蓝隼 于 2008-06-02, 00:38:50:
回答: too costly to change. 由 steven 于 2008-06-02, 00:28:18:
one of the Mars landers was believed to crashed during the final descend because of the inconsistency between the manufacturer and the mission controller in unit using.
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