zero tolerance
noun [ U ] uk/ˌzɪə.rəʊ ˈtɒl.ər.əns/ us/ˌzɪr.oʊ ˈtɑː.lɚ.əns/
（对犯罪行为无论轻重一律严惩的）零容忍政策
the act of punishing all criminal or unacceptable behaviour severely, even if it is not very serious
The police are exercising a new policy of zero tolerance against motoring offenders. 警方现在实施新政策，对驾车肇事者严惩不怠。