intermittent
/ˌɪntəˈmɪtənt; ˌɪntɚ`mɪtnt/ adj
continually stopping and then starting again; not constant 断续的; 间歇的
intermittent flashes of light from a lighthouse 灯塔发出的一闪一灭的光
intermittent bursts of anger, energy, interest, etc 一阵一阵的怒气、 精力、 兴趣等
an intermittent fever 间歇热.