For some the sound could make sleep harder, but for others, the steady beat of the ticking, or the quiet hum of an electric motor in a fan can be very peaceful.
有些东西发出的声音令你很难入睡，但有些东西是固定行走或敲打的，风扇有规律的转动的声音听起来很和平。
2
When Li Da and Wang Dingnan got to Matou, they found all the motor vehicles and horse-drawn carriages facing south, ready to beat a retreat.
李达、王定南一到那里，看见所有的汽车、马车都是头向南，准备撤退的。
3
The motor drives the rotating rack to rotate through the belt pulley; and the cross bar and the pipe barrel beat the soybean plant for threshing.