wiper arm

例句：

1. 1. The car's wiper arm is broken, so we need to buy a new one.
   汽车的擦窗器臂坏了，所以我们需要买一个新的。
2. 2.The engineer inspected the wiper arm and found that it was not working properly.
   工程师检查了擦窗器臂，发现它没有正常工作。
3. 3. The wiper arm on the window is designed to automatically adjust its angle for maximum efficiency.
   窗户上的擦窗器臂设计为自动调整角度，以实现最大效率。