So now we have a ground body. We can use the same technique to create a dynamic body.

我们已经有了一个地面体，我们可以使用同样的方法来创建一个动态物体。

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With the world defined, you specify the ground body within that world and its position.

定义了此世界后，就可以指定该世界内的地面体及其位置了。

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The next two segments in the setup phase define the static ground body and the dynamic sphere body.

设置阶段的下两个部分是定义静态的地面和动态的球体。

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This makes it more difficult for the body to effectively use the same amount of oxygen as it would on the ground.

VOA: special.2009.07.14

Picture my body lying on the ground unconscious.

想像我的身体无知觉地躺在地上。

耶鲁公开课 - 死亡课程节选

Experts say the body begins losing oxygen minutes after an airplane leaves the ground.

VOA: special.2009.07.14

Arctic ground squirrels survive body temperatures as low as 27 degrees Fahrenheit without freezing, during their long hibernation in the permafrost.

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The wife of a Brazilian runner, Cas Camara, who came in dead last far past the 60-hour mark, screamed and cried and begged her husband, who had fallen to the ground, his body seemingly wasted, to get up, get up and finish.

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The video showed legs dangling through the floor, then a body slumping onto the ground beneath - ending up with legs buckled under the body and the bound hands falling over to the right.

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