adventitiousadj.
英 ,ædv(ə)n'tɪʃəs | 美 ,ædvɛn'tɪʃəs
中文adj. 外来的，偶然的
词根词源
adventitious (adj.)"of the nature of an addition from without," c. 1600, from Medieval Latin adventitius "coming from abroad, extraneous," a corruption of Latin adventicius "foreign, strange, accidental," from advent- past participle stem of advenire "arrive" (see advent). Related: Adventitiously; adventitiousness.
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