"And,when you get the sense of cooperation and common goals, common purposes among the people here today, you cannot help but see that this is something positive growing out of something that is such a tragedy."

VOA: standard.2009.10.19

Harmony is indeed invisible in sense Number 1, you cannot see it with your eyes, but for all that, it can be destroyed.

和声用无形的第一种解读方式理解，确实是无形的，你看不见它，但是它可以毁灭。

耶鲁公开课 - 死亡课程节选

Hysteria includes phenomena like hysterical blindness and hysterical deafness, which is when you cannot see and cannot hear paralysis, trembling, panic attacks, gaps of memory including amnesia and so on.

癔症的临床表现包括,癔症性失明和癔症性失聪，它们是指你在并无器质性损伤的情况下,此外还有瘫痪，震颤，恐慌症，健忘症之类的记忆缺失等等。

耶鲁公开课 - 心理学导论课程节选

You cannot see the horse, but the horse is moving.

你看不到马,但是它在运动

耶鲁公开课 - 基础物理课程节选

You see you cannot tell the height or the depth rather of a pool based on the average.

只知道平均值,并不知道游泳池的水深。

哈佛公开课 - 幸福课课程节选

And in terms of doing this for your homework, I actually want to mention that in the back page of your notes I attached a periodic table that does not have electron configurations on them. It's better to practice doing electron configurations when you cannot actually see the electron configurations.

关于你们的作业，是在你们讲义的后面的页,我附上了一张,没有给出电子构型的周期表,最好联系一下做出电子构型,当你们实际上看不到,电子构型的时候。

麻省理工公开课 - 化学原理课程节选

Now, I look around this room, I don't see anybody whose head is three times bigger than mine, so I know that you cannot digest everything the books have.

我在教室里扫了一遍,没看见谁的脑袋比我大三倍,我知道你们是不可能看完这本书的

耶鲁公开课 - 基础物理课程节选

You cannot say to me, "Take a force, due to a spring, and see what force it applies and divide by the acceleration and get the mass, " because we haven't defined force, either.

你不能说,"给弹簧施加一个力,看看它能提供多大的力,然后除以加速度,得到质量",因为我们还没给力下一个定义

耶鲁公开课 - 基础物理课程节选