So, this is really small, this is undetectably small.

所以，它非常的小，无法察觉的小。

麻省理工公开课 - 化学原理课程节选

We don't know what--It's like the workings of our kidneys or our stomachs.

这就像是我们无法察觉,肾和胃的活动一样。

耶鲁公开课 - 心理学导论课程节选

It's still undetectably small.

它仍然是无法察觉的小。

麻省理工公开课 - 化学原理课程节选

As we will learn throughout the course, by far the vast majority of what our brains do, the vast majority of what our minds do, is unconscious and we're unaware of it.

正如我们将会在这门课中了解到的，尤其是绝大多数的大脑活动，绝大多数的心理活动，其实都是无意识的，是无法察觉到的。

耶鲁公开课 - 心理学导论课程节选

Where--One of the big findings from social psychology, and we'll devote almost an entire lecture to this, that people have strong views about other races that they don't know about and that they don't know how to control their actions.

我们将来几乎会用一堂课的时间，来介绍一个社会心理学的重大发现，人们对其他的民族有极深的成见,但这些成见往往是他们自己无法察觉的,也是他们不知道该如何去控制的。

耶鲁公开课 - 心理学导论课程节选