Definition: a small object that you push up or down with your finger to turn something electrical on or off Level: B1
请按一下开关来开灯。
Please flip the ___switch to turn on the light.
离开时记得关掉开关。
Remember to turn off the ___switch when you leave.
他向上推开了开关，启动了机器。
He pushed the ___switch up to start the machine.
