Each insect was placed for five minutes in an apparatus that had two chambers, one of which contained a sample of the volatiles and the other an odourless control.

每只昆虫都被放置在一个两室装置内五分钟，一个腔室内含有挥发性质样本，另一个则毫无气味，以此作为实验对照。

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

作为实验对照，让每种类型中相同老鼠继续饮用普通水。

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

他们从普通群体中招募了一支不抽烟实验对照组。

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

剩下两个实验是对照组，一组使用安慰剂，另一组不使用安慰剂。

When extinction was not possible, as in the patients had to be abstinent while taking the medication, 36 out of 37 trials found no significant benefits from the medication.

如果不具备“灭绝”条件（比如患者在服用该药同时，不得摄入使其成瘾那些东西），在 37 项随机对照实验中，有 36 项发现，该药没有明显疗效。

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.

来自纽约大学团队在英格兰全境 83 名医生 691 名抑郁症病人身上进行了随机对照实验。

The current study was not a controlled experiment designed to prove how the amount or type of protein people eat might directly affect the length of their lives.

目前不是一个旨在证明人们摄入蛋白质或类型如何直接影响其寿命对照实验。

(either less or more than three days after diagnosis) rather than a randomised controlled trial in which some patients were given a placebo instead of the treatment under test.

（诊断后少于或多于三天）而不是随机对照试验在对照实验中，一些患者被给予安慰剂，而不是实施治疗。

And without the herbivore effect in the model-so in the control run-we found that only 50 percent of the permafrost area would remain by the year 2100.

如果模拟中没有食草动影响，即在对照实验组中，我们发现到2100年，只有50%永久冻土区能保留下来。

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首个生产力结果，其中一个是让人们写商业文章对照实验。

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对照实验中仔细验证塞耶一个世纪前想法，看看它是否真像他声称那样普遍。

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

该不是旨在证明发短信或其它活动是否或如何导致车祸对照实验。

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

23人中7人为实验对照，术后未接受Bolli博士实验操作。

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

我们需要主题足够多更全面对照实验，在得出任何真实结论之前。

This same effect was true for the scientists, who'd volunteered their arms in solidarity with their feline subjects.

几位科人员也主动伸出手臂参与对照实验，他们身上也呈现出相同驱蚊效果。

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对照实验从未发生过。

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

另外两组是对照组，实验对象只进行慢离心训练和快离心训练。

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

这需要进行随机对照实验，一组戴口罩，另一组不戴。

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

你刚才描述既是负对照实验，也是正对照实验。

Later, his colleague, Adolf Vorderman, conducted controlled experiments with prison inmates, some eating polished rice and some eating unpolished rice, showing that the anti-beriberi factor was present in rice husks and kernels.

后来，他同事阿道夫·冯德曼对监狱囚犯进行了对照实验，一部分人食用精米，另一部分人食用糙米，结果显示抗脚气病因子存在于稻壳和米粒中。