别想了，99% PDE 解不出来的，能知道点解的性质就不错了。

来源: BeLe 于 2018-05-25 15:57:32 [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.

Change Ad Consent