There is good reason to doubt this.

有正当理由怀疑这件事。

《柯林斯英汉双解大词典》

There seems no reason to doubt her story.

似乎没有理由怀疑她所说的话。

《牛津词典》

His behaviour was so strange that I began to doubt his sanity.

他行为怪异，我有点怀疑他是否神智正常。

《牛津词典》

It seemed to me also that every living African, whether in good or ill health, is prey to many enemies of health that would interact one upon the other in many ways within one human body, Critics feared if President Mbeki appeared to doubt the link between HIV and the disease, people would not practice safe sex and use condoms.

VOA: standard.2010.05.17

Too many fall from great and good For you to doubt the likelihood.

太多人以前伟大，美好,让你怀疑这样巨大变化的可能性。

耶鲁公开课 - 现代诗歌课程节选

So we tend to doubt all of these different traditions.

所以我们开始对那些传说产生了怀疑。

耶鲁公开课 - 新约课程节选

But there is reason to doubt that Sanofi's success with Acomplia will come from obesity alone.

FORBES: French drug giant Sanofi prepares for fat city.

One reason to doubt her spying credentials is that Ms Zatuliveter was so conspicuous.

ECONOMIST: Russian espionage

You know how high expectations can be and how setbacks can cause people to doubt.

UN: Secretary-General