The data on effectiveness are not perfect, which is why we’re doing a controlled study. But they are substantial.

对手术来说，产生预期郊果的数据并不完美，这也是我们正在做对照研究的原因，但手术的价值是巨大的。

youdao

The aim of the present study was to compare STACE to conventional TACE in a controlled study of candidates for liver transplantation (LT) for hepatocellular carcinoma (HCC).

本研究的目的是比较常规TACE对照研究肝细胞癌（HCC）肝移植（LT）的候选人灯光音响。

youdao

A government study recommended a national highway system of 33,920 miles, and Congress passed the Federal-Aid Highway Act of 1944, which called for strict, centrally-controlled design criteria.

一项政府研究建议建设一个33,920英里的全国公路系统，国会通过了1944年的《联邦援助公路法案》，该法案要求制定严格的、集中管控的设计标准。

youdao

In a controlled study, some patients would have taken aspirin.

VOA: special.2009.09.01

What one of the psychiatrists I spoke to said what they really need to do is show the effects in a controlled study.

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It is a randomized controlled study, meaning that similar patients were assigned at random to either get either Centrum or placebo.

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Given that the association between diet drinks and with vascular events is unexpected and unsupported by other research, a study that controlled for specific ingredients, such as the type of sweetener and caffeine content, is needed to assess whether there are grounds for a plausible mode of action.

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