每小时4000公里是三倍多音速。牛！试验过从哪到哪了？

来源: kingofhearts 于 2019-09-28 13:39:53 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

WENXUECITY.COM does not represent or guarantee the truthfulness, accuracy, or reliability of any of communications posted by other users.