double-blind

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In the best of all worlds, treatments are selected on the basis of multiple independent double-blind studies.
所有世界上最好的，针对自闭症的治疗措施，应出自基于多种独立的双盲研究。
The experiment was double-blind—neither the subjects nor the scientists knew which liquid was which—a technique considered especially strong in research science.
因为使了一种被认为特别强的技术，这个实验是双盲的，无论实验对象还是科学家都不知道哪个液体是什么。
But it turns out there are some small but well-conducted double-blind studies demonstrating significant reductions in migraines in people taking one of these supplements.
但结果是有虽然小但是反映良好的双盲测试证明吃任意一种营养品的人，偏头痛症状确实有明显减轻。

Removing the double-blind restriction in such an environment is an invitation for science abuse.
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Neither doctors nor patients knew who was getting what until the end (that's the double-blind part).
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Many providers of alternative therapy say it is inherently unsuited to double-blind randomised trials.
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A double-blind study or trial, especially in medicine, is one in which two groups of people are studied, for example with one group taking a new drug and one group taking something else, but neither the people in the study nor the scientist or doctor knows which person is in which group.

A double-blind study or experiment compares two groups of people, one of which is being tested while the other is not. Neither the people doing the testing nor the members of the two groups know which group is being tested. (AB)