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doubtful
01
犹豫不决
(of a person) uncertain or hesitant about something
02
不可能的
improbable or unlikely to happen or be the case
03
疑
unsettled in mind or opinion
例子
The student looked doubtful when asked if he understood the complex math problem.
He was doubtful about the success of the project, considering the tight deadline.
She felt doubtful about the sincerity of his apology, wondering if it was genuine.
He appeared doubtful about the reliability of the information he received.
She seemed doubtful about the decision, unsure if it was the right choice.
