就我而言，我不知道没有它我会如何生存。

For my part, I don't know how I'd live without it.

youdao

我觉得我们生存在这个星球的关键点在于我们不知道如何防止民众受到来自环境的影响。

I think we're really at a point in our planet's existence where we don't know how to prevent people from affecting the environment.

youdao

我不知道他们是如何生存下去的。

I don't know how they get through life.

youdao