occasionaladj.偶然的;临时的;不时的
occasional success偶然的成功
occasional defense偶然防卫
occasional dumping偶发性倾销
occasional service临时业务
occasional species偶见种
occasional crossing偶然杂交
occasional journeys间或旅行
occasional stirring间歇搅拌
occasional offender偶犯
occasional tinnitus偶发性耳鸣