我没有察觉到原来他那时非常不开心。

I didn't realize but he was deeply unhappy at that time.

《牛津词典》

这种观点认为，人们之所以没有察觉到海洋中发生的巨大变化，是因为他们用于回顾过去的时间相对较短。

The notion is that people have failed to detect the massive changes which have happened in the ocean because they have been looking back only a relatively short time into the past.

youdao

这是不是意味着你提到的第一个假设是错误的，那个假设说我们在集中注意力的时候甚至没有察觉到不相关的信息？

Doesn't that mean that the first hypothesis you mentioned was wrong, the one that says we don't even perceive irrelevant information when we are concentrating?

youdao

I met a lot of people there and I never once got the idea that anyone there was evil or grasping.

在那我见了很多人,但是我没有察觉到,任何恶毒或者贪婪的气息。

耶鲁公开课 - 金融市场课程节选

The flashing of these subliminal words, a fancy term meaning below the level of consciousness, you don't know you're seeing them has dramatic effects on how you answer those questions.

这些阈下词语的闪现，“阈下“是指低于意识水平，“subliminal“，meaning，–,也就是说你并没有察觉到，自己在看这些词语,阈下词汇的闪现对你如何回答那些问题,产生了显著的影响。

耶鲁公开课 - 心理学导论课程节选