We had doubts about the validity of their argument.

我们对他们的论点的正确性有过怀疑。

《牛津词典》

She had doubts about his faithfulness.

她怀疑他的忠诚。

《牛津词典》

He had doubts about large, bureaucratic organizations.

他对庞大的官僚机构心存疑虑。

youdao

Analysts say that Republicans have had some success in raising doubts about the Obama health care initiative by focusing on the impact of the plan on the growing federal budget deficit and by raising the specter of too much government interference in the health care sector.

VOA: standard.2009.09.02

As early as 1992, exit polls showed that voters had doubts about Clinton's honesty and integrity.

CNN: y: On style and substance, heading off toward November

She said that initially she had doubts about offering a room, because she has two young children.

BBC: Humberside

Mr McCain, a war hero, is up against a man who had doubts about wearing a flag pin.

ECONOMIST: The race is on in earnest, but his party's chances look grim