command switch

例句：

1. 1. The engineer needs to turn on the command switch to start the machine.
   工程师需要打开命令开关才能启动机器。
2. 2.The technician found the command switch under the desk and turned it off.
   技术员在桌子下面找到了命令开关并把它关掉了。
3. 3.The doctor instructed the patient to press the command switch before he could operate the machine.
   医生指示病人在他能操作机器之前先按命令开关。