A non-smoking control group was recruited from the general population.

他们从群体中招募了一支不抽烟的验照组。

Equivalent numbers of each type continued to be given ordinary water as a control.

作为验照，让每种类型中相同数量的老鼠继续饮水。

The remaining two experiments were controls, one with and one without a placebo.

剩下的两个验是照组，一组使安慰剂，另一组不使安慰剂。

The other two conditions were controls, where subjects only did either slow eccentric or fast eccentric training.

另外两组是照组，验象只进行慢离心训练和快离心训练。

We discovered that this control experiment, which was obligatory in order to gain approval, never took place.

我们发现，这个为了获得批准而必须进行的照验从未发生过。

That would need randomised controlled trials, in which one group wore masks and the other did not.

这需要进行随机照验，一组戴口罩，另一组不戴。

We need more comprehensive, controlled trials with plenty of subjects before we can come to any real conclusions.

我们需要研究主题足够多的更全面的照验，在得出任何真结论之前。

Seven of the 23 acted as a control group, and received no intervention from Dr Bolli after the surgery.

23人中7人为验照，术后未接受Bolli验操作。

The study was not a controlled experiment designed to prove whether or how texting or other activities might cause crashes.

该研究不是旨在证明发短信或其它活动是否或如何导致车祸的照验。

It's an important, I wouldn't even call it a control.

这是一个重要的步骤，我甚至不认为它仅仅是一个照验。

And what you just described is both a negative control and a positive control experiment.

你刚才描述的既是负照验，也是正照验。

D. Controlled experiments on wrens and other birds.

D. 鹪鹩和其他鸟类的照验。

The new hypothesis needs to be tested with a new controlled experiment.

新的假设需要一个新的照验来检验。

In it, social scientists randomly assigned low-income families into a control group or one of two experimental groups.

其中，社会科学家将低收入家庭随机分配到照组或两个验组之一。

So if you think you're losing your hair from taking creatine, then stop and see, do the control experiment.

所以如果你认为自己掉头发是因为吃了肌酸，那就停一下看看， 做个照验。

Scientists have only recently started carefully testing Thayer's century old idea in controlled experiments to see if it's really as universal as he claimed.

科学家们直到最近才开始在照验中仔细验证塞耶一个世纪前的想法，看看它是否真的像他声称的那样遍。

A team of researchers from the University of New York conducted a randomized control trial with 691 depressed patients from 83 physician practices across England.

来自纽约大学的研究团队在英格兰全境 83 名医生的 691 名抑郁症病人身上进行了随机照验。

We have the first early results on productivity from these tools and one is a controlled experiment that was done with people writing business writing.

我们得出了这些工具的首个生产力结果，其中一个是让人们写商业文章的照验。

One drawback with the studies is that they are all retrospective, looking back at naturally occurring data rather than randomised-controlled experiments.

这些研究的一个缺点是它们都是回顾性的，回顾自然发生的数据而不是随机照验。

Peter Rothwell at the John Radcliffe Hospital in Oxford and his colleagues looked at deaths due to cancers during and after randomised trials of daily aspirin.

来自牛津的约翰·拉德克里夫医院的彼得·罗思韦尔（Peter Rothwell）和他的同事们研究了在每日服阿司匹林的随机照验期间或者之后因癌症而死亡的病例。