研究人员分配一半志愿者接受真正的治疗，另一半接受一个装置发出的安慰剂——看上去类似激光，但实际上是低功率LED光。

Half the participants were assigned thereal treatment; the other half received a placebo from a device thatlooked similar to the laser but was in fact a low-power LED.

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为了寻找新的变倍补偿方式并降低设计变焦距系统时对经验的过分依赖，提出了一种光焦度分配及变焦补偿方法。

In order to arrive a new compensation mode that reduces the dependence on design experience for a zoom lens, a way for power allocation and compensation is proposed.

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这种方法在一定程度上降低了变焦系统光焦度分配的难度，同时为探寻新的变焦运动方式提供了新的思路。

This method helps to reduce the difficulty of power allocation and provides different ways to find the new compensation mode.

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