(B)A layer of primer on an airliner weighs more than a layer of the new coating would by an amount large enough to make a difference to that airliner's load-bearing capacity.
旧的（A layer of primer）要比新的（a layer of the new coating ）重，（若换成新的），差额的这部分可以增加客机的载客量。
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发表于 2010-8-12 02:23:19
