Building segments of the plant's solar arrays on Earth, along with supports and a central transmitter, would take two years or so.

太空太阳能电厂所需的各种光能收集板、支架和中心发射器等，可先在地面建造，耗时大约两年左右。

youdao

It's a central human question that drives us to wonder about origins-of humans, life, the Earth, the Universe.

这是一个促使我们去发现关于人类、生命、地球和宇宙起源的中心问题。

youdao

The age of the Earth is central to that question, and it has been taken on by human cultures for millennia.

地球的年龄是这个问题的中心，已经被人类文化承载了几千年。

youdao

Butz first heard about the site when he began working for Cambridge Central Schools as an earth science teacher more than a decade ago.

WSJ: NY teacher delves into mystery of 'Indian Ovens'

In the living room, two wool-covered dog beds take center stage, flanking the central wooden bench along with earth-toned couches.

WSJ: A Gossip Girl's Main Stage

You hail from every corner of the Earth -- from Southeast Asia to Central Europe, from West Africa to South America.

WHITEHOUSE: My Fellow Americans