So even if you have just an hour or two, try your hand at a bit of crowd-sourcing in the name of Earth defense.

所以即使您只有一两个小时的时间，也请以保卫地球的名义，来在这次群众分包活动中小试身手吧。

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It seems as though, at the approach of a certain dark hour, the light of heaven fills those who are quitting the light of earth.

仿佛在某种惨痛的时刻临近时，上天的光特来照临那些被尘世的光所离弃了的人们一样。

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At 8:30 local time, soon after this picture was taken, the district went dark in support of the world's third Earth Hour.

在当地时间的8点30分(即如下图所示)，为支持第三个地球一小时活动日，整个街区变暗了。

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At least nineteen of the fifty American states are planning to take part in the two thousand ten Earth Hour observance.

VOA: special.2010.03.22

To signal the end of Earth Hour at 9:30 pm the quadrocopters will reform the Star Trek logo above London's skyline.

ENGADGET: Quadrocopter fleet stuns Londoners with giant hovering Star Trek logo (video)

But the earth is moving at over 67, 000 miles per hour.

FORBES: Why I Named My Dog After Neil Armstrong

Dragon's rendezvous systems had never been tested before in the harsh conditions of space, with the station and the capsule racing around the Earth in tandem at about 17, 000 miles an hour.

WSJ: SpaceX Craft Rehearses Moves