their fervor for the cause

他们对这一事业的热情

He took up the cause with evangelical fervor.

他以传道者般的热情投身于这一事业。

The hype and fervor surrounding the event positively invited scepticism.

围绕这件事的大肆渲染和热情必然会引起人们的怀疑。

The speech aroused nationalist fervor.

这个演讲喚起了民族主义热情。