宠物满足了人类想照顾一点自然界的愿望。

Pets satisfy man's desire to care for a bit of nature.

youdao

但我们从未在自然界观测到这一点，也从未在实验室里实现过。

This is something that has never been observed in nature or produced in a laboratory.

youdao

但我们从未在自然界观测到这一点，也从未在实验室里实现过。

This is something that has never been observed in nature or produced in a laboratory.

youdao