1.know one's way about
精通门路收藏指正
2.know one's own business
精明能干收藏指正
3.But I know one single truth .
可我知道一个人儿。收藏指正
4.pretend to know what one doesn't know
强不知以为知收藏指正
5.to know what one wants
了解某人需要什么东西收藏指正
6.know both one's opponent and oneself
知己知彼收藏指正
7.feel sure; know what one is doing
心里有准儿收藏指正
8.One that buys goods or services.
主顾购买货物或享受服务的人收藏指正
9.Oh,no.Do you know of another one?
哦，真糟糕，你知道哪里还有吗？收藏指正
10.One who sells goods aggressively, especially by calling out.
小贩尤指通过吆喝的方式主动兜售货物的人收藏指正
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