adj.偶然的；临时的；不时的
He's someone I have an occasional chat and joke with. 我偶然跟他闲聊，一起说笑话。
An occasional outburst of anger creates wrinkles on the face. 一次愤怒的偶然爆发会在脸部产生皱纹。
He is only an occasional workman. 他只是个临时雇工。
He now smokes only an occasional ceremonial cigar. 他现在只是为了应酬偶尔抽根雪茄。
adv.偶尔地
n.偶然性
