Sometimes I really doubt whether there is love between my parents.

有时候，我真的怀疑父母之间是否有真爱。

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In many cases there is reasonable doubt as to whether patients or doctors, consumers or producers, could more readily have avoided the harm.

在许多案子中这是有道理怀疑的，究竟是病人还是医生、消费者还是生产商能够更好地避免损害。

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And even if they are successful, there is doubt as to whether such a plan could withstand another round of voting by the bailout-fatigued European populace.

即便欧洲能够成功提交这份计划，它能否在早已对救助心生厌倦的欧洲民众新一轮投票中获得通过仍是一个问题。

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But in this case there is a doubt whether the returns justify the risk.

ECONOMIST: High-frequency trading: Wait a second | The

There is still doubt as to whether Social TV as a siloed habit can scale.

FORBES: Social TV: The Viggle-GetGlue Merger Makes Sense, But Does It Matter?

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

ECONOMIST: Anita Hoffman