unsuccessfuladj.
英 ʌnsək'sesfʊl; -f(ə)l | 美 ,ʌnsək'sɛsfl
中文adj. 不成功的；失败的
词根词源
unsuccessful (adj.)1610s, from un- (1) "not" + successful (adj.). Related: Unsuccessfully. A noun unsuccess "lack of success" is recorded from 1580s.
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