名詞 turn off:

1. something causing antagonism or loss of interest
   同義詞：turnoff, negative stimulation
2. a side road where you can turn off
   同義詞：turnoff

動詞 turn off:

1. cause to stop operating by disengaging a switch
   同義詞：switch off, cut, turn out
2. make a turn
3. cause to feel intense dislike or distaste
   同義詞：put off

1. You should have had enough sense to turn off the electricity supply before disconnecting the wires.
   你本來應該有足夠的常識，在拆開電線之前先把電源切斷。
2. Do you mind if I turn off the light?
   我把燈關掉你不反對嗎?
3. Turn off the switch when anything goes wrong with the machine.
   如果機器出故障，就把開關關掉。
4. Please turn off the electric power.
   請把電源關掉。