But, why come to Earth in the first place?

但是，首先为什么要到地球来呢？

youdao

It explains why there is nothing more natural than that we should come to Earth, at such an important time to help you.

这也解释了没有什么事情比这个最自然的了，那就是我们应该来到地球，特别是在这样一个重要的时期来帮助你们。

youdao

Eris is real, but it is a dwarf planet similar to Pluto that will remain in the outer solar system; the closest it can come to Earth is about 4 billion miles.

行星厄里斯是真的，但它是一个和冥王星类似的矮行星，将继续待在太阳系外围；它最接近地球的位置有大约40亿英里。

youdao

He said her voice was so powerful that it seemed to come from under the earth.

VOA: special.2009.01.25

I'd like to get away from earth awhile, And then come back to it and begin over.

我真想暂时离开人世一会儿，然后再回来，重新干它一番，可是。

耶鲁公开课 - 现代诗歌课程节选

"His extraordinary life on this earth has come to an end," "The extraordinary good that he did lives on."

VOA: standard.2009.08.26

How fitting, then, that evidence unearthed not far from Roswell suggests that life could indeed have come to earth from outer space.

ECONOMIST: Old salts

Somehow, during the closing credits, I managed to come back to earth, just in time to head over to the Belly-Up, the venue for the book reading.

NPR: A Comic Horror Story from Aspen

They simply have to come down to earth.

WSJ: Facebook IPO Facts, Fiction and Flops