由于我们看不到在沟通的人，那个人是看不到我们说话的时候也许在微笑着的。

Because we can't see the person we're communicating with, that person can't see that we might be smiling when we talk.

youdao

例如，我们可以看到墙上的苍蝇，但我们的眼睛是看不到它细致的毛发和面孔。

For example, while we can see the fly on the wall, our eyes aren't equipped to make out the fine details of the hairs on it's face.

youdao

还有鲸，鲸不是让你们随意捕杀的，鲸是被杀掉一头就死一头的，不像小鱼小虾那样多，如果我们把鲸杀掉了，那我们的子孙后代，他们不是看不到鲸这种动物吗？

And whale, a whale is not let you catch at will, whales are killed a head died a head of, don't like fish shrimp, so if we kill whales, that our children, they are not see whales this animal?

youdao

Can anyone not see it? Does anyone need -- actually I can't even tell if you raise your hand. So ask your neighbor if you can't see it and get one of the plates if you're having trouble seeing with the glasses. So this should match up with the spectrum that we saw.

有人没看到的吗？,有人需要-实际上你们举手我也看不见,看不到的话就问你们周围的人借个小片,如果你们用眼镜看不到的话,这应该和我们看到的光谱是吻合的。

麻省理工公开课 - 化学原理课程节选

But it's very interesting that when you get to historical Greece, as we shall see, there are no wanaktes but there are, at least according to tradition, basileis.

但相当有趣的是,在希腊历史中我们看不到王这一称谓,但至少是根据传说是有君主这一称谓出现的

耶鲁公开课 - 古希腊历史简介课程节选