happenvi.发生;碰巧;出现;偶遇
happen withvt.发生
happen types发生类型
happenchancen.偶然事件
happenstancen.偶然事件adj.偶然的
happen alongvi.偶然出现(意外出现;偶然到来)
Happened law发生规律
happen to do碰巧 ...
happen to say偶然提到
Happening Art偶发艺术
Happened laws发生规律