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.