很容易的，用盆用水晃几下，沙子就在最底下了。

来源: iBear 于 2019-03-14 10:57:52 [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