it's no use doing 是没有用的做 ; 它这样做的任何使用
it's no use doing something 做某事没有作用
It's no use doing sth 做 ; 做某事没有好处
it's no use doing event 做某事没有功能
B. It's no use doing STH.
表示“做某事是没有用处的”。
youdao
It's no use saying: "We are doing our best." You have got to succeed in doing what is necessary.
光是尽力而为是不够的，为了争取成功，势必还得克服所有困难险阻才行。
It's no good (use) doing that.
那样做没好处(没用)。
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