be doubtful of

常见例句

If you have sorrowful past, perhaps he would be doubtful of your heart.
如果你的过去不是很快乐，也许他要怀疑你的心了。
And seek not ye what ye shall eat, or what ye shall drink, neither be ye of doubtful mind.
你们不要求吃什么，喝什么，也不要挂心。
And if you do take one, you'll probably make the shop assistants feel unease, they might be doubtful of your intentions.
倘若你自己带着拎包进店，反倒会使店家觉得不踏实，没准会怀疑你是扒手呢！

"Well they certainly will be doubtful of it unless President Obama makes a strong argument.

But the Scottish secretary's job, which will be of doubtful value once all law-making and spending responsibility has been passed to the Scottish parliament, looks to have been made completely redundant by the new committee.
ECONOMIST: The constitution
One clear danger is that they may alienate customers, who will welcome better service but may be more doubtful about uses of the technology such as finely segmenting the market or targeting customers individually.
ECONOMIST: Always-on people
It's the answer that led those who have been told for so long by so many to be cynical, and fearful, and doubtful of what we can achieve to put their hands on the arc of history and bend it once more toward the hope of a better day.
NPR: Transcript Of Barack Obama's Victory Speech