怀疑的，可疑的；对…怀疑

doubtful───adj.可疑的；令人生疑的；疑心的；不能确定的

doubtfully───adv.怀疑地；含糊地

doubtfuls───怀疑

doubtfulness───怀疑

distrustful of───不信任

doubloon───n.达布隆（古西班牙金币）

doubtable───adj.令人怀疑的；可疑的

I was doubtful of the merits of such restrictions, but then this may have been the only way to cut off the power demand for money.───我当时对他的约束办法有怀疑，但也认为可能是斩断权力借贷的唯一办法。

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！

Glaciologists have been doubtful of that 2035 date since the report came out.───但该报告一出笼，2035年最后期限的言论便遭冰川学家们的质疑。

To be frank, I'm doubtful of the result of your examination.───坦率地说，我对你的考试成绩表示怀疑。

However, quite a few researchers are doubtful of this new structure model.───然而，不少学者对这一新的水铁矿结构模型提出了质疑。

If the umpire is doubtful of the legality of a service he may, on the first occasion in a match, declare a let and warn the server.───如果裁判员对运动员发球合法性有怀疑，在一场比赛中第一次出现时，判重罚球，并警告发球方。

Kleist was deeply doubtful of languages expressive capability. He believed that language could not express the whole thought of human beings.

And if you do take one, you'll probably make the shop assistants feel unease, they might be doubtful of your intentions.

The roundabout corridors enhance the verticality of the apartments and make people doubtful of the ever limited area of the apartments.

In stroke play only, when during play of a hole a competitor is doubtful of his rights or procedure, he may, without penalty , play a second ball.

I am very doubtful of that.