In order to evaluate and validate cleaning processes some manufacturers have processed a placebo batch in the equipment under essentially the same operating parameters used for processing product.

为了评估和验证清洗过程，有的生产商在设备中按照与加工成品完全相同的操作参数进行无效对照药批次生产。

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One thing that is known about the placebo effect is that it involves several brain systems, each under the control of a particular type of messenger molecule, called a neurotransmitter.

关于安慰剂效应，已知的一点是它涉及到了几个大脑系统，每一个都由一种特殊的信使分子控制，称为“神经递质”。

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There was a significant faster dissolution of haematomas under the treatment with Hirudoid in comparison to placebo.

血肿的分解，喜疗妥组要显著快于安慰剂组。

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Some patients might do worse than they would under a placebo, while others might do better.

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They were, despite that title, too kind to the hypothesis that the drugs under examination actually did have therapeutic value that a placebo could not duplicate.

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Under a four-year study, one third of the women will be given the gel, one third a placebo and one third will not receive any, while all will be given condoms and taught about their use.

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