Definition: to suddenly become very angry Level: C2
她突然发火，开始大喊大叫。
She ___lost ___her ___cool and started shouting.
尽管压力巨大，这位谈判者从未失去冷静。
Despite intense pressure, the negotiator never ___lost ___his ___cool.
裁判员至关重要的一点是即使球员抗议也不能发脾气。
It's crucial for referees not to ___lose ___their ___cool, even when players protest.
