例句與造句

1. The intersection of the pointer arm with the hour markings on the inner disc indicates the time.
2. The damping force is roughly proportional to this force and the clamping nut is provided with a pointer arm to indicate the approximate setting.
3. The north star is sighted through the center of the device, and the pointer arm is rotated to point at the chosen reference star.
4. It's difficult to find pointer arm in a sentence. 用pointer arm造句挺難的