为评估研究提供一个参照数据库。

To provide a reference dataset for evaluating research.

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为了确保相机准确地记录来自反射光的细微变化，工程师寻找暗背景上的亮光，来提供一个参照点。

To make sure that the cameras are accurately recording small changes in reflected light, engineers look for a bright light against a dark background to provide a reference point.

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味觉不仅仅是给女人提供了一个人卫生习惯的参照窗口；同时让女人了解了她们相中的男人的不可见的DNA的特点。

Sense of smell doesn't just provide a window into hygiene habits; it also gives women access to the unseen DNA of their chosen mate.

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