到了河边，我无法看到我的兄弟。

When I got there I couldn't see my brother.

youdao

禅生：有时我失去了兴趣，因为我无法看到任何进步。

Yogy: Sometime I lose interest because I cannot see any progress.

youdao

但我看得出来，那是架直升机，它落到山那边去了，我无法看到。

It was far away for me, but I could see that it was a helicopter and it went down on the backside of the mountain where I couldn't see.

youdao

So look, why am I justified in believing in germs, various kinds of viruses that I can't see, or bacteria or what have you, that I can't see?

所以,我为什么相信微生物,相信各种肉眼无法看到的病毒,细菌等诸如此类我看不到的东西确实存在

耶鲁公开课 - 死亡课程节选