He has no doubts about his manliness.

他毫不怀疑他的男子气概。

《柯林斯英汉双解大词典》

Malcolm, for instance, works in isolation but I have no doubts about his abilities.

例如，马尔科姆虽然一个人独立工作，但我丝毫不怀疑他的能力。

《柯林斯英汉双解大词典》

I had no doubts.

我的心中没有丝毫疑惑。

youdao

Those who have managed to get hold of tickets have no doubts it will be an unforgettable match, like this Spanish fan who has high hopes his team will win.

VOA: standard.2009.05.26

No wonder that with an uncertain voice coming out of the White House, Americans will have their doubts,".

VOA: standard.2009.09.22

And we have no doubts that in this case it will have more benefit for everyone.

WHITEHOUSE: President Obama and President Santos Hold a Press Conference | The White House

Representative TOM DELAY (Republican, Texas): I say goodbye today, Mr. Speaker, with few regrets, no doubts.

NPR: Voters Tell Washington that Ethics Matter

There should be no doubts about the bravery of either team, or about their considerable accomplishments.

FORBES: South to the Pole: Leadership Wins the Race