B21的任務之一是擔任美國核震懾的nuclear triad之一，隻要美國還想繼續當核大國，就必須要有許多的B21。

來源: 大觀園的賈探春於 2025-01-03 21:38:30 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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