很有意思的题目，人类文明的积累的确是积沙成塔的一个渐进过程！

来源: polebear 于 2022-12-08 17:00:07 [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