在地球的表面,地震会使地面发生震动,有时则会发生地面移动。
At the earth's surface, earthquakes manifest themselves by shaking and sometimes displacing the ground.
很明显,除了利益和民族主义,其他紧急的事物将迫使人类在地球表面留下他们的足迹。
It is clear that imperatives other than profits or nationalism will have to compel human beings to leave their tracks on the planet's reddish surface.
臭氧在距地球表面12至30英里的地方形成一个保护层。
Ozone forms a protective layer between 12 and 30 miles above the Earth's surface.
That is the lowest point on the earth's land surface so this dramatic drop in just a very short geographical area.
这是地球陆地表面的最低点,这急剧下降是在很短的地理范围内。
One says, leave any body near the Earth, it yields a force.
有人说,在地球表面的任何物体,都会受到力的作用
So, when you divide by m, m cancels and everything falls at the same rate on the surface of the Earth.
因此,当等号两边除以 m 时,m 被消去了,在地球表面的所有物体,都以相同的加速度下落
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