胡說八道即使多說幾次也還是胡說八道。

來源: bi-elliptic 於 2020-10-22 16:00:34 [] [舊帖] [給我悄悄話] 本文已被閱讀： 次 (227 bytes)

Cruise missile has nothing to do with how high the altitude is. Cruise means the thrust from the engin is at irs optimum efficiency for fuel and power output. For hypersonic, low altitude cruising is highly unlikely.

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