Once Earth had gone through the final stages of its formation, gases bubbled to the surface and were held by Earth's gravitational field to form the atmosphere.

一旦地球经历了其形成的最后阶段，气体就会鼓泡到地表，并被地球的重力场控制，形成大气。

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In 1992, the first UN Earth Summit was held in Rio de Janeiro.

1992年，第一届联合国地球峰会在里约热内卢举行。

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The earth union held an urget meeting in a university.

地球同盟在一所大学里召开了紧急会议。

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It was my teacher. I held her with all my strength then shook with joy to feel the solid earth under my feet."

VOA: special.2009.11.15

The first Earth Hour was held in two thousand seven in Sydney,Australia.

VOA: special.2010.03.22

The level of damages in that case will be established at a later hearing, but that could be held up as Friends of the Earth said it plans to appeal.

NPR: Dutch Court Rejects Most Of Shell Spill Case

If it's mobile, then it will probably feature somewhere, in some form, at the Mobile World Congress (or MWC to insiders), one of the biggest gadget shows on earth, and held in Barcelona next week at the Fira Gran Via, from Feb. 25-28.

WSJ: Move It!

Greek myth held that Zeus had defeated Kronos in a wrestling match for possession of the earth, so Olympic competition, held close to the god's massive temple, was seen as a sacred act or privilege, available only to a select few.

WSJ: London Olympics 2012: For Disgraced Athletes, the Wrath of Zeus