相对速度重要，能量(~速度的平方)之差更重要。高速时能量差大得吓人！

来源: 3271963 于 2010-05-07 12:47:11 [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.