两个都要有，但是最起到关键作用的是负重

来源: 落花飘零于 2022-09-19 11:41:08 [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.