adventitious
adj. 外来的,偶然的
例句
Adventitious buds regeneration from etiolated internode segment of apple cultivar Nagafu no.
富士苹果黄化茎段再生不定芽的研究。
They had to decide whether his misconduct was adventitious or the result of a flaw in his character.
他们必须确定他的错误行为是偶然发生的还是因为他的性格缺陷造成的。