我对他的解释感到疑惑。

I feel doubt about his explanation.

她感到疑惑自己是否忘记关火了。

She wondered if she had left the stove on.

他感到疑惑那个奇怪符号的含义。

He wondered about the meaning of the strange symbol.

她感到疑惑是否应该接受这份工作。

She wondered whether she should take the job offer.

我感到疑惑他是如何这么快解决问题的。

I wondered how he managed to solve the problem so quickly.

他们感到疑惑为什么商店这么早就关门了。

They wondered why the store was closed so early.

对…感到惊奇，对…感到疑惑。

To marvel or wonder at.

医生们对他的奇异的不眠感到疑惑。

The doctors were puzzled by this strange continuous sleeplessness .

医生们对他的奇异的不眠感到疑惑.

The doctors were puzzled by this strange continuous sleeplessness.

即便这样的解释，市民对此还是感到疑惑。

Even such an explanation, the public still feel puzzled.