Ecologists argue that the benefits of treating sewage with disinfectants are doubtful.
生态学家们认为用消毒剂处理污水的好处是值得怀疑的。
He holds a doubtful attitude towards the latest findings.
他对最新的研究发现持怀疑态度。
And whether the community's work contributes much to an overall accumulation of knowledge is doubtful.
社区的工作对知识的全面积累是否有很大的贡献，这一点是值得怀疑的。
Like many college teachers around the U.S., the faculty remain doubtful that their work as educators can be measured by a "learning outcome" such as a graduate's ability to investigate and reason.
与美国各地的许多大学教师一样，教师们仍然怀疑，他们作为教育工作者的工作能否通过像毕业生的调查和推理能力这样的“学习成果”来衡量。
Yet like many college teachers around the US, the faculty remain doubtful that their work as educators can be measured by a "learning outcome" such as a graduate's ability to investigate and reason.
然而，与美国各地的许多大学教师一样，教师们仍然怀疑，他们作为教育工作者的工作能否通过“学习成果”来衡量，比如毕业生的调查和推理能力。
The awful cynicism of this made an uncomfortable impression, and most of them began to look rather doubtful.
这种可怕的冷嘲热讽给人留下了一种不舒服的印象，他们中的大多数人开始露出怀疑的神色。
The arrangement is of doubtful legality.
这项约定是否合法值得怀疑。
It's doubtful whether there'll be any seats left.
看来未必还有座位。
It is doubtful whether Ted, even with his fluent French, passed for one of the locals.
让人存疑的是特德——即使法语说得很流利——能否被人当作一名当地人。
They paused at the top of the stairs, doubtful as to which way to go next.
他们在楼梯的顶头停了下来，不知道下一步朝哪个方向走。
Glenn Schellenberg was doubtful about the claim that music education helps enhance children's intelligence.
格伦·舍伦贝格对于音乐教育有助于提高儿童智力的说法表示怀疑。
I was doubtful about what they have said, but I didn't say anything.
我对他们说的话感到很怀疑，但我也没说什么。
The boys obtained some strings and borrowed some bait from their doubtful father.
男孩们取得了些细绳并从他们那将信将疑的父亲处借到了一些饵料。
Most biologists, nonetheless, are doubtful that this is a humanlike adolescent growth spurt.
尽管如此，大多数生物学家还是怀疑这是否是一种类似人类的青春期突增。
Yet it is doubtful whether the proposition is strong enough to bear the vast weight of generalization that has been placed on it.
然而，令人怀疑的是，这个命题是否足够强大，足以承受被置于其上的广泛的泛化的重量。
For as long as anyone can remember, Piedmont's character has been completely bound up with the Westvaco paper mill: its prosperous past and doubtful future.
因为只要有人还能记得，皮埃蒙特的特性就一直与维实伟克造纸厂完全绑定在一起：它繁荣的过去和不确定的未来。
It is doubtful whether an investor's sniping at management can ever be anything other than counterproductive, but in this case it is clearly not justified.
投资者对管理层的攻击是否只会适得其反是值得怀疑的，但在这种情况下，这显然是不合理的。
The faculty remain doubtful that their work as educators can be measured by a "learning outcome" such as a graduate's ability to investigate and reason.
在美国，教师们仍然质疑他们教育者的工作是否可以通过“学习成果”来衡量，比如毕业生的调查和推理能力。
Though feeling doubtful, the old lady got into her car.
尽管感到怀疑，老太太还是上了车。
"His eyes are so round," said Martha, a trifle doubtful.
“他的眼睛那么圆。”玛莎有点犹豫地说。
As soon as he finished, his supporters applauded vigorously, but most of the masses were taken aback and exchanged doubtful glances.
他的话完了，他的几个支持者拼命地鼓掌，而更多的人却噤若寒蝉，面面相觑。
Without the Domain Name System, it's doubtful the Internet could have grown and flourished as it has.
要是没有域名系统，互联网能像现在一样成长并且兴旺发达是可疑的。
Under these uncomfortable conditions, it is doubtful that doctors can get accurate measurements.
在这种不舒适的条件下，医生能否得到准确的测量结果是可疑的。
"Timewise, it is doubtful the picture will recover," one crewmember wrote at the time.
“就时间而言，很怀疑影片拍摄能恢复。”剧组一成员当时写道。
Defeat the doubtful thoughts: in one column, write a doubtful thought, and in the opposite column, write facts that dispute that doubtful thought.
战胜怀疑想法：找一张纸，画出两栏，在一栏上写出一个自我怀疑的想法，然后再另一栏上，写出质疑这个想法的事实。
Such concept car looks amazingly nice but its practical side is more doubtful.
这种概念车看起来很震撼，不过它的实用价值更令人怀疑。
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