She could fly into a passion without making a noise.

她可以不声不响地投入激情。

Having spent himself somewhat and got rather irritable, he at last turned from foreign Jacobins to home-bred nihilists and socialists, and ended by flying into a passion.

他花了点心思，脾气暴躁，终于从外国的雅各宾派变成了本土的虚无主义者和社会主义者，最后一发不可收拾。

I don't quite know what's the matter with her as she insists on making a secret of the whole thing and flies into a passion if you ask her questions.

我不太清楚她是怎么回事，因为她坚持对整件事保密，而且如果你问她问题，她就会火冒三丈。