unprecedentedadj.

英 ʌn'presɪdentɪd | 美 ʌn'prɛsɪdɛntɪd

中文adj. 空前的；无前例的

词根词源

unprecedented (adj.)1620s, from un- (1) "not" + precedented. In common use from c. 1760.

关键词

unprecedented