1.
Phantom Cosmology and Gravitational Back Reaction;
Phantom宇宙学和引力反作用
2.
For every action there's an equal and opposite reaction.
每一个作用力都会引起相等的和相反的反作用力。
3.
tractive effort
牵引(效)力, 牵引作用, 挽力
4.
Action and reaction are opposite and equal.
作用力与反作用力大小相等、方向相反。
5.
action and reaction are equal and opposite.
作用力与反作用力大小相等，方向相反。
6.
Many agents cause weathering.
许多作用力引起风化。
7.
The earth is pulled towards the sun by the force of gravity.
太阳靠引力作用把地球吸引着。
8.
For traction to be effective, countertraction and friction are necessary.
要使牵引有效，必须使用反牵引和摩擦力。
9.
a gun trigger that responds with little pressure.
用微力就可以引起反应的扳机。
10.
action & reaction demonstrator
作用力与反作用力演示器
11.
reaction type brake tester
反作用力制动试验台
12.
inertia reaction moment tester
惯性反作用力矩测试仪
13.
Newton thought gravity was a mysterious force acting between two objects, but Einstein explained that it is the curving of spacetime.
牛顿认为地心引力是两个物体间的神秘作用力，而爱因斯坦认为它反映的是时空的扭曲。
14.
The thing is accomplished without trouble, without effort,without reaction,--following a natural and tranquil law.
受某种平静的自然法则的支配，这个过程不会引起混乱，无须付出努力，没有任何反作用。
15.
The idea of an inverse-square law of gravitational force acting on the planets was in the air around Newton's time.
认为作用于行星的是平方反比定律的引力，这种看法在牛顿时代很流行。
16.
On the Reaction of Ideological and Political Work to the Influence of Environment;
论思想政治工作对环境作用力的反应作用力
17.
a free and rapid descent by the force of gravity.
由于地球引力的作用而引起的自由、快速的下降。
18.
The reaction is the force F'exerted by the block on the man.
其反作用力F’为物块对人施加的力。