An investigational or marketed product (i. e., active control), or placebo, used as a reference in a clinical trial.

在临床试验中用作对照的研究用产品或已上市产品(例如：阳性对照)，或安慰剂。

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Methods the clinical trial method was adopted, vein transfusion patients were randomly divided into the study group and the control group.

方法采用临床试验研究方法，将静脉输液病人，随机分组。

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Clinical study of drugs must be approved by the SDA before it is carried out, and must follow the Criterions for the Quality Control of Clinical Trial of drugs.

药物临床研究必须经国家药品监督管理局批准后实施，必须执行《药物临床试验质量管理规范》。

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The investigators are now conducting a randomized, controlled clinical trial of RAGE Control in the outpatient clinic at Boston Children's that adds a cooperative component.

ENGADGET: Researchers create video game that monitors heart rate to keep children's anger in check

There, Schering-Plough and Merck seemed to have too much control over the delayed clinical trial, called ENHANCE.

FORBES: Is Merck Flying Blind?

Though faecal transplantation for C. difficile has still to undergo a formal clinical trial, with a proper control group, it looks a promising (and cheap) answer to a serious threat.

ECONOMIST: The human microbiome