throw of switch

例句：

1. 1. The engineer threw the switch to turn on the lights.
   工程师按下开关来打开灯。
2. 2. The farmer used a switch to open the gate.
   农民用一个开关来打开大门。
3. 3. The doctor switched off the machine to save the patient's life.
   医生关闭了机器以拯救病人的生命。