intermittent是什么意思

　　例句：

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

　　3个小时断断续续的降雨之后，比赛取消了。

　　Our picnic was marred by intermittent rains.

　　我们的野餐被断断续续的降雨给破坏了。

　　Did you hear the intermittent sound outside?

　　你听见外面时断时续的声音了吗？