shut (something) off
phrasal verb with shut verb [ I or T ] uk/ʃʌt/ us/ʃʌt/ shutting | shut
关机;关掉,关闭
If a machine or system shuts off, or if someone or something shuts it off, it stops operating.
The engine shuts off automatically when the desired speed is reached. 达到设定的速度后,发动机会自动关闭。