护城河分两类，一是终极市场只允许存在一到几个竞争者，二是存在某种障碍使得用户或竞争者难以跨过

来源: monseigneur 于 2023-01-25 12:44:20 [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.