Calculating this angle would allow astronomers to measure what was then the ultimate goal: the distance of the Earth from the Sun.

计算这个角度可以让天文学家测量地球到太阳的距离，这是当时的终极目标。

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The short wave signals bounce off the ionosphere that surrounds the Earth,back to the ground and then back to the ionosphere.

VOA: special.2010.12.08

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

Then, the fact that the Earth is going around the Sun.

接着,还有地球绕着太阳转的这一个事实

耶鲁公开课 - 基础物理课程节选

Why then on Earth would it take a cloture vote to get additional lending to go to community banks in order to get it to small businesses to create jobs?

WHITEHOUSE: Press Briefing

Abrupt methane releases from frozen regions may have played a major role in two events, 55 and 251 million years ago, that extinguished much of the life then on Earth.

BBC: Climate 'tech fixes' urged for Arctic methane

Since then Railroad Earth had been a consistent draw at rock clubs, theaters, and bluegrass festivals, earning a devoted following of so-called hoboes who trailed the band from town to town and trade cassettes of their live shows.

NPR: Railroad Earth Jams Live on Two-CD 'Elko'