測量一下才知道。天然水域，如果沒有水流，冰下的水一般降到4度就不會再降了。

來源: TBz 於 2021-02-07 08:18:56 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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