Will you be turning off your lights this Saturday night to observe Earth Hour?

VOA: special.2010.03.22

It's dangerous to want to get away from earth awhile, to get your feet entirely off the ground.

想要逃离地面一会，让自己的双脚同时离开地面很危险。

耶鲁公开课 - 现代诗歌课程节选

Worse still,after about 20 minutes after the ship takes off, all radio contact between ship and earth will be destroyed.

更坏的是，当飞船起飞20分钟后，所有飞船与地球的无线电通讯都被切断。

耶鲁公开课 - 死亡课程节选

The lights will stay off for one hour for an event called Earth Hour.

VOA: special.2010.03.22

If you escape the pull of gravity, your spaceship will be off, won't be orbiting the Earth.

如果你完全脱离重力,太空船早就飞得没影了,而不是在轨道上运行

耶鲁公开课 - 基础物理课程节选

The researchers say their findings support the idea that a huge explosion or explosions caused fire and pressure powerful enough to kill off life on the Earth.

VOA: special.2009.01.20

I felt alone,cut off from friends, high above the firm earth.

VOA: special.2009.11.15

"This phone will work only for 11 days, when we are near the Earth, but it will be switched off later."

VOA: standard.2010.06.02