你为什么在地球上？

Why are you on the earth?

youdao

是什么在地球上，你希望有一个玻璃立方体，我问她。

What in earth do you want a glass cube for, I asked her.

youdao

科学家们通过研究发现这些化石的地方，希望能找到羽毛最早什么时候和为什么在地球上出现这个谜题的答案。

When and why feathers first appeared on the earth is just one puzzle scientists hope to solve by studying the area where the fossils were found.

youdao

In the universe we-- Who knows what is out there in the universe but at least on Earth we may well be the only people there are.

在宇宙中，我们-,谁知道宇宙中有什么,但至少在地球上我们很可能是唯一的。

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