There is some doubt about the best way to do it.

这件事怎么做才是最佳办法有点吃不准。

《牛津词典》

There is some doubt whether he'll come.

他是否会来是有疑问的。

youdao

There is some doubt whether he will be elected.

他是否能当选还不太确定。

youdao

"It sure looks like the way they are suppressing speech, the way they are suppressing crowds, they way in which people are being treated that there is some real doubt about I do not think we are in a position to say,".

VOA: standard.2009.06.14

I just want to make mention of this in case there's ever doubt, generally parentheses do solve your problem as an arithmetic but do realize this is some lower level details we'll come back to over time.

是想告诉大家如果你对某些式子的前后运算关系不确定，就加上括号,这都是一些小细节,我们以后还是会再提到的。

哈佛公开课 - 计算机科学课程节选

There is some doubt, though, whether he was much pursued, except in his mind.

ECONOMIST: Anita Hoffman

Costs have been reduced, to a level where there is some doubt that any more reductions could be made.

ECONOMIST: Church of England: Counting the doomsday option | The

There is some doubt, generally, about the cohesion of the new OVR bloc.

BBC: Russia, bombs and elections