People with dementia may forget family members or not know what day it is.

VOA: special.2009.12.28

We may not know that the soul will continue to exist after the destruction of the body but at least it seems like a possibility.

我们或许不知道,在肉体毁灭后,灵魂继续存在,至少看起来有这样的可能。

耶鲁公开课 - 死亡课程节选

And for me it's fun because I may not know the novel that you end up picking, and so it is a kind of challenge for me to take a novel that you've chosen and come to grips with it myself It may be one that I know.

我也觉得很好玩,因为我可能不知道你们最后选择的小说，所以对我来说,认真对待你们选的一本书很有挑战性,可能是一本我知道的书。

耶鲁公开课 - 1945年后的美国小说课程节选

But you know, when people eat pancakes it may not be this extreme, but still, there are a lot of things that-- where the portion sizes are misestimated.

但当人们吃薄煎饼时可能没那么夸张,但仍然,量非常大,每日摄入量被完全错估了

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

This is so obvious in this problem, but when you see more complicated formula, you may not know all the assumptions that went into the derivation and quite often you will be using it when you shouldn't.

在这道题中这些都很明显,但是当我们用更复杂的公式时,你可能搞不清楚所有,在推导时的前提,因此很多时候,你都会用错公式

耶鲁公开课 - 基础物理课程节选

Now the people in this poll were asked the same question and here's what they said, so 75% said that one reason is that it's more convenient, it's what people like to eat, it's heavily advertised, it's more affordable, people may not know which foods are healthy.

在这个调查中人们也被问到了这个问题,我们来看看他们的答案,75%的人说选择垃圾食品是因为更方便,合乎口味,广告的大力宣传,更便宜,人们可能并不知道哪些食物才是健康的

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选