The durability of the ipef is also in doubt.

ipef的持久性也存在疑问。

" When in doubt, always choose C." Right?

“遇到不确定的题就选 C”，对吧？

“When in doubt, go to the library.”

“一有疑问，就上图书馆。”

There is no doubt in my mind.

我毫不怀疑地这样想着。

She looked at doubt in tears, then turned Andy.

她含泪疑惑地看着安迪 然后转过身去。

If in doubt, black it out.

如果有疑问，请将其涂黑。

When in doubt, just try it.

当你有疑问的时候，就上身试试。

If you're in doubt, smart-casual attire is usually preferred.

如果你不确定的话，首选通常是时髦休闲的服装。

But they were left in doubt barely a second longer.

他们的疑问很快就有了答案。

But he shows more doubt in his new book, “Strategic Vision”.

但他在自己的新书《战略眼光》中表露出更多的担忧。

The debate raged, but the result was never really in doubt.

这次辩论很激烈，但结果是毫无疑问的。

Going into the break, the result never looked to be in doubt.

在中场休息时，比赛结果看起来毫无悬念。

The contract, Mr Hollande repeated on May 10th, is not in doubt.

Hollande于5月10日多次强调，实施合同势在必行。

Other qualities were evident by then, her femininity was never in doubt.

那时她的其它优秀品质也已经非常明显，她的女性魅力是毋庸置疑的。

She hesitated, as if in doubt how best to word her gratitude.

她犹豫了，仿佛怀疑着怎样表达她的谢意最好。

There's no doubt in my mind that I did the right thing.

我毫不怀疑自己做了正确的事。

And when in doubt, err on the side of buying a book versus not.

当真的不知道是否要买一本书时，买了总比不买好一些。

And then go on to comment any doubts you have in the comments below.

然后，在下方评论处把你的疑问打上去。

This isn't a firm rule, but if in doubt, keep them short.

这并不是一个严格的规定，但如果没有把握的话，尽量写简短一点。

I would say when in doubt, use fair or dark to describe somebody's skin tone.

在不太确定时，我会用浅色的和深色的来描述某人的皮肤颜色。