回复：一堆屁话，没有结论，结论是手高低于水面无关。

来源: 于 2011-04-27 21:33:48 [旧帖] [给我悄悄话] 本文已被阅读：次

Thorough analysis, deep conclusion. Thanks a lot, TA! You work very hard for the class and MYSJ forum!