我们所能确定的就是它们曾经生存过。

All that we can be sure of is that once they lived.

youdao

至少我曾经体验过，不过我从来不靠它生存。

So at least it's something I experience, but that's not where I live.

youdao

至少我曾经体验过，不过我从来不靠它生存。

So at least it's something I experience, but that's not where I live.

youdao