Will it work? It seems doubtful.

这项计划会起作用吗？似乎很疑。

It is doubtful that he will come.

他会会来疑。

A sceptical person is doubtful about something.

一个持疑态度的人对某事表示疑。

" Doubtful that I would turn up? " Dumbledore suggested shrewdly.

“相信我真的会来？”邓布利多尖锐地指出。

I am doubtful whether she is still alive.

我难以确定她是否还活着。

Uncertainty means that something is doubtful or unknown.

确定性是指某些事是可疑的或未知的。

Oh, doubtful. I just moved here from London.

哦？会吧。我刚从伦敦搬过来。

It is doubtful whether Ted will keep his promise.

泰德会会履行承诺令人起疑。

She too was initially doubtful surgery could help her.

她最初疑手术是否可以帮助到自己。

Doubtful. Klaus doesn't want to be pointed out.

太可能。克劳斯人找到。

We were doubtful about what the government was saying.

我们一直疑政府的说法。

She added compromise with Britain is still possible, but doubtful.

她补充称，虽然会与英国妥协，但仍存有变数。

Some people, however, are still doubtful of the new rules.

然而，一些人仍然对新规表示疑。

I was doubtful about the old man's good intentions.

这个老头的好意令我起疑。

The shopman was examining the note with a puzzled, doubtful air.

店员带着困惑、疑的神检查着那张票据。

The prospects for the Tokyo Olympics in July and August are doubtful.

7月和8月东京奥运会能否如期举行堪忧。

It's doubtful that computerized voting will make the situation any better.

计算机化的投票将会让状况变更好这一点是疑的。

Some economists remain doubtful about whether it's a sound economic policy.

一些经济学家仍然疑这是否是一个合理的经济政策。

Wujing looked doubtful. " This horse is too slow to be a dragon" .

" 这马的速度太慢了，可能是龙啊。"

Any theory that has not been tested is just a doubtful one.

任何未经检验的理论都是足为信的。