intermittent是什么意思

　　例句：

　　After three hours of intermittent rain, the game was abandoned.

　　3個小時斷斷續續的降雨之后，比賽取消了。

　　Our picnic was marred by intermittent rains.

　　我們的野餐被斷斷續續的降雨給破壞了。

　　Did you hear the intermittent sound outside?

　　你聽見外面時斷時續的聲音了嗎？