wiper

1.the beat of the wipers became almost hypnotic.

挡风玻璃上的雨刷发出有节奏的声音，让人昏昏欲睡。

2.the wipers should operate without chatter .

汽挡风玻璃上的器运转时不应有震动声。

3.the wipers were wigwagging to keep the windscreen clear.

雨刷来回摆动使挡风玻璃保持清晰。

4.The speed of the windscreen wipers is variable.

汽挡风玻璃上雨刷的速度是可变的。