在几千米外，主弹头分成几十个小弹头，然后从亚音速状态下加速到大约三倍音速的速度。
the warhead separates a few dozen kilometres away and then accelerates from almost the speed of sound to about three times as fast.
在几千米外，主弹头分成几十个小弹头，然后从亚音速状态下加速到大约三倍音速的速度。
the warhead separates a few dozen kilometres away and then accelerates from almost the speed of sound to about three times as fast.
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