因为不造大战斗机的alternative是造许多小战斗机，所以当然要比叫大飞机和小飞机

因为不造大战斗机的alternative是造许多小战斗机，所以当然要比叫大飞机和小飞机

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送交者: HHS 于 2010-06-15, 12:49:04:

回答: Notice that this is cost-per-unit-volume 由虎子于 2010-06-15, 12:43:52:

But airplane was not in your original question (无内容) - 虎子 (0 bytes) 2010-06-15, 13:44:20 (453040)
- I take that back. What I mean is that in your question - 虎子 (86 bytes) 2010-06-15, 13:46:03 (453042)