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