vary off的用法和样例：
例句
- Are the ship's main radio transmitter aerials earthed and radars switched off?
船上主要的无线电发射天线是否已接地，雷达设备电源是否已断开？ - Whenever the machines have been put in working order,they'll keep on doing the jobs they have been"told"to do until they are turned off or break down.
每当机器进入工作状态，它们会把让它们做的工作进行下去，直到电路断开或坏了为止。
