But, why come to Earth in the first place?

但是，首先为什么要到地球来呢？

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

On a night more than 2, 000 years ago, an angel of the Lord brought good tidings of great joy: the God of Heaven had come to Earth, and he would be with us always.

某一晚在两千多年前，一个天使基督带来了良好的大喜讯：上帝的天堂，来到地球，他将与我们永远。

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.

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