safety-valve

n 1 valve that releases pressure in a steam boiler, etc when it becomes too great 安全阀. => illus at pan 见 pan 插图. 2 (fig 比喻) way of releasing feelings of anger, resentment, etc harmlessly （无害地）发泄怒气、 怨恨等的方式: My hobby is a good safety-valve for the tension that builds up at work. 我用业余爱好来消除工作中产生的紧张情绪.

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