用delta作为衡量标准更靠谱一些吧，一旦过了0.6 0.7，roll up就没有多少意义了

来源: dancingpig 于 2025-05-19 18:09:48 [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.