驾驶员必须随时对驾驶室内发生的事情保持警惕，把安全放在第一位。

The driver must be on alert for anything that occurs in the cab and make safety his top priority.

youdao

驾驶员必须随时对驾驶室内发生的事情保持警惕，把安全放在第一位。

The driver must be on alert for anything that occurs in the cab and make safety his top priority.

youdao