心脏病发作

have a heart attack

疟疾发作

have an attack of malaria

他胃病发作了。

His stomach trouble is flaring up.

歇斯底里症发作

fit of hysterics

药性发作。

The medicine took effect.

酒力发作。

The alcohol took effect.

毒性发作。

The effect of the poison took hold.

他的忧郁症又发作了。

He suffered another fit of depression.

他发作起来什么都不管。

He doesn't care about anything when his temper flares up.

他虽然生气，却不便发作。

Although he was angry, it was inconvenient for him to lose his temper.

他们心怀不满，借机发作。

They weren't happy, and took the opportunity to show it.