1.
having dropped by the force of gravity.
由于地心引力而倒下的。
2.
a simpledemonstration of gravity
地心引力的简单证明
3.
The attraction of the earth for other bodies is called the force of gravity.
地球对其它物体的吸引称为地心引力。
4.
a pump that use centrifugal force to discharge fluid into a pipe.
利用地心引力放水到管中的泵。
5.
A juggler really runs a race with gravity.
玩杂耍的人确实在跟地心引力竞赛呢。
6.
an orienting response to gravity.
对地心引力的一种定向反应。
7.
a generalization of special relativity to include gravity.
包含地心引力的广义特别相对论。
8.
The growth of a living organism in response to gravity, as the downward growth of plant roots.
对于地心引力的向性有机体的生长对地心引力的向性，如植物根部向下长
9.
Or that the force of gravity works?
有一种地心引力在作用，这如何能够证明？
10.
A black hole is gravity gone mad, nothing can ever escape.
黑洞等同于地心引力大失控，一切都难逃一劫.
11.
Gravity is pulling every raindrop and snowflake and hailstone.
地心引力在吸引着每一个雨点，每一片雪花和每一块冰雹。
12.
We find acting on the ball three forces ; the resistance of the air, the resistance of the ground and the attraction of gravity .
我们发现，作用在这个球体上有三个力：空气的阻力、地面的阻力、地心引力。
13.
If you weight yourself, you will know how much gravity is pulling you.
如果你称一下体重，你就会知道多大的地心引力在吸你。
14.
Scientists can observe what they believe to be dark matter only through its gravity.
科学家们相信只有透过它的地心引力才能观察到黑暗物质。
15.
We shall pretend that there is a big switch that can change the pull of gravity.
我们要假设有一个能改变地心引力的大的转换器。
16.
The girl in the picture can blame gravity for her tumble.
图中的那个女孩可能正埋怨地心引力使她摔倒呢。
17.
What is it about a black hole that makes it so powerful? The answer is gravity.
究竟是什么使黑洞变得如此厉害?答案是:地心引力.
18.
Though at first glance it might seem have no substance， the second body does posses some weight and is thus subject to gravity.
虽然乍一看，它表面上是非物质的，但第二身体确实具有一些重量，因而受地心引力的吸引。