某一时点难判断。虽说“东方鱼肚白，西方夕阳红”，但多凭经验猜测，不能绝对正确。：）

来源: yujing_hk 于 2020-04-11 16:58:34 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

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