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。
We were doubtful about the practicability of the plan.
我们怀疑这个计划是否切实可行。
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。
When he weeded out "the most doubtful measures of aggression", only 28% supported a connection.
当他排除“最可疑的攻击手段”时，只有28%的人支持这种联系。
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。
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。
那本身就令人怀疑。
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。
Rose was doubtful about the whole idea.
罗斯对整个设想持怀疑态度。
It's doubtful whether there'll be any seats left.
看来未必还有座位。
It's doubtful if this painting is a Picasso.
这未必就是毕加索的画。
With her injuries it's doubtful that she'll ever walk again.
她多处受伤，今后能否行走还很难说。
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。
This wine is of doubtful quality.
这酒的质量有问题。
He was doubtful about accepting extra work.
他拿不定主意是否接受额外工作。
It's doubtful whether the car will last another year.
这辆汽车未必还能用上一年。
I was still very doubtful about the chances for success.
我仍然不能肯定成功的可能性有多大。
Forsyth is doubtful for tonight's game with a badly bruised leg.
福赛斯因为严重的腿伤不太可能参加今晚的比赛。
For a time it seemed doubtful that he would move at all.
短期内他似乎不大可能搬走。
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。
The research lacks solid evidence, and therefore, its conclusions are doubtful.
这项研究缺乏确凿的证据，因此，其结论值得怀疑。
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。
It's doubtful that a computer program can do that—at least, not without some undesirable results.
计算机程序能否做到这一点是存在疑问的，至少，它一定会带来一些人们不想要的结果。
It is doubtful, however, that human educators will lose their jobs to Bill any time soon.
然而，令人怀疑的是，人类教育者是否会在短期内被比尔抢走工作。
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