safe·ty valve
noun/ˈseɪfti vælv/
/ˈseɪfti vælv/
- a device that lets out steam or pressure in a machine when it becomes too great
安全阀 - a way of letting out feelings of anger, excitement, etc. without causing harm
疏导（情绪）的方法 - Exercise is a good safety valve for the tension that builds up at work.
锻炼身体是排解工作压力的好办法。
- Exercise is a good safety valve for the tension that builds up at work.