2 sentences for 发作 (fā​zuò — lose one's temper)

1. 听了这些话，他终于发作了。

   tīng le zhè​xiē huà, tā zhōng​yú fā​zuò le.

   Hearing these words, he finally lost his temper.

   Source: Dong Chinese Dictionary

2. 他努力按住心头的怒气，没有当场发作。

   tā nǔ​lì àn zhù xīn​tóu de nù​qì, méi​yǒu dāng​chǎng fā​zuò.

   He tried hard to suppress his anger and didn't explode on the spot.

   Source: Dong Chinese Dictionary