Now, even though it may be difficult to understand how a huge mass of ice can move—or flow, it's another word for it—it's really no secret that glaciers flow because of gravity.
如今,即使想要知道一大块冰如何移动——或换个词讲,漂浮——是非常困难的,但众所周知冰川漂浮是由于重力。
The earth is round because of gravity.
地球是由于重力而成为球形的。
The earth is round because of gravity .
地球是由于重力而成为球形的。
Because of the gravity on Mars, spacesuits may have to be designed to be lighter than suits used in orbit or on the moon.
VOA: special.2011.04.06
It's wrong to think that you feel weightless because you escaped the pull of gravity.
但是要是你认为失重,就是不受重力那就大错特错了
When Shepard did hit the golf balls, they traveled "for miles and miles," as he reported, because the gravity on the moon is one-sixth of the gravity on Earth.
VOA: special.2011.05.15
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