The plot does stretch credulity.

这种情节确实让人难以置信。

The play's plot stretches credulity to the limit.

这出戏的剧情简直就是胡编滥造。

They traded on his credulity.

他们利用了他的轻信。

He has practised on my credulity.

他利用了我的轻信。

The combined effect strained credulity.

这种综合效应使轻信加剧。