她面前的窗台上摊着一本书，几乎觉察不到的风不时地吹动着书页。

A book lay spread on the sill before her, and the scarcely perceptible wind fluttered its leaves at intervals.

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否则，你可能光专注于你所认为做错的而现场观众却觉察不到的东西。

Otherwise there's a risk that you may get fixated on something you think you did wrong – but which the live audience didn't notice.

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这是因为在讲演现场中，有一些不能被录像所表现出来且观众觉察不到的东西。

This is because there are some things which stand out in a video which the audience wouldn’t have noticed during the live presentation.

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Typically, we are oblivious to these factors that change our points and this is, in fact, a substantial and an important part of the study of psychology, and particularly, for instance, the study of racial and sexual prejudice.

通常，我们觉察不到,这些能够改变我们看法的因素,无意识实际上，是心理学研究中的一个重要内容，特别是在对种族偏见和性别偏见的研究中，会表现的更加明显。

耶鲁公开课 - 心理学导论课程节选