喷嘴利用液体的反作用力驱动。
This cleaning spray head is driven by the counter-force of the liquid.
反作用力把人造卫星送入轨道。
然而如果遇上足够强大的反作用力，经济动力将会迅速消失。
Yet economic momentum is quickly dissipated if it meets strong-enough counterforces.
蒸汽排放所产生的反作用力给火箭提供了动力。
The discharging steam provided the rocket with motive power.
把表面粗糙化也可能是减小飞机反作用力一个办法。
There may also be a way to cut aircraft drag by making some surfaces less slippery.
在科学思想史上，反作用力原理的发现是一座伟大的丰碑。
The discovery of the reaction principle represents one of the great milestones in the history of scientific thought.
如果这种情况是正确的，那就意味着进化的核心存在反作用力。
If this picture is correct, it means that there are opposing forces at the heart of evolution.
通过螺杆回转，熔体聚集于料筒前部，反作用力使螺杆后退。
Screw Rotation Feeds and Shears Material Into a Melt. Melt Collects Into Front of Barrel, Forcing Screw Back.
因为力一向是两个物体间的交互作用，枪施予球推力，球施予枪反作用力。
Since forces are always an interaction between two objects, the gun pushes on the ball and the ball pushes back on the gun.
现在反作用力是向上，但是情形没有改变，相反这提供了两个短线进场点。
The resistance is now an up-line. However, that does not change the situation. Instead it offers two entry points for the short trade.
产生电压的同时，导体受到阻力(反作用力)，即推力的功转化成电能输出。
Produce voltage at the same time, by conductor resistance (reaction), namely thrust power into electricity output.
语言结构隐含两种基本力：作用力与反作用力，它们分别包括一系列力倾向。
Linguistic structures suggest two types of basic forces: agonist and antagonist that include a series of force tendencies.
这是牛顿第三定律的意义：对于每一个作用力总是有其大小相等的反作用力。
This is the meaning of Newton's Third Law: there is always an equal reaction to every action.
至少有一些咒语表现得像自然能量，包括力、反作用力等在自然物体中可看到的力量。
Spells, at least some of them, behave like physical energy, with forces, counterforces, and vectors much like those seen in physical objects.
反作用（二级）力：当物体反抗原始力的影响时，惯性和动力的效果便是反作用力。
Reacting ( Secondary ) Forces: the evidence of the effects of inertia or momentum in the body as it reacts to the influence of the Initiating Force.
结果：描述、分析了完整起步过程各步相的特征以及地面对足的三维反作用力规律。
Result: Gait characteristic and foot-ground reaction forces in initiation from standing at rest to the heel-contact for the second time was analyzed.
另外，由于线圈同时受到板料和凹形导槽的反作用力，有利于提高线圈的使用寿命。
In addition, since the coils are reacted by the metal sheet and the conductive outer channel, help to improve the life of the coils.
也就是说，对于任一物体或表面施加的作用力，该物体或表面必会产生相同的反作用力。
That is, for every force applied to an object or surface, that object pushes back with equal force.
作用力等于反作用力，这是牛顿第三定律，因此Fij与Fji完全相等，但它们方向相反。
Actions equals minus reactions, according to Newton's Third Law, so this force, Fij, will be exactly the same as Fji, except in the opposite direction.
攀爬有内角的岩壁时，攀登者可以利用两侧岩面的反作用力来攀爬。也指“打开的书”地形。
An inside corner in which a climber can use counter-pressure on each side to climb it.
激光推进是利用高能激光与工质相互作用产生的反作用力推动飞行器前进的一种新概念推进技术。
Laser propulsion, which works on the counterforce generated during the interaction between high-power laser and propellant, is a new concept technique for propulsion.
现在，我走到街头，看见一个男孩玩滑板，或者木匠钉钉子，都会停下来分析他的作用力反作用力。
"I walk down the street analyzing the force of a boy on skateboard or the recoil of a carpenter using a nail gun, " he wrote.
基于以上发现，似乎好像赤脚跑步对身体更好，因为较少的反作用力意味着更少的护具和更少的眼泪。
Based on such findings, it would seem as if running barefoot should certainly be better for the body, because less pounding should mean less wear and tear.
在现代商品农业条件下，农业活动取决于外围生态系统，并在更大程度上对外围系统施加反作用力。
Under conditions of modern commercial agriculture, agricultural activities relies on and gives counteractions to the outside ecosystems to a determining extent.
如果手臂在水中是向前伸展则阻力会随之增加而向后方的反作用力也会出现，二者都会产生负加速度。
If an arm is stretched forward under water resistance is increased and a reaction force back ward is developed both of which would contribute to negative acceleration.
如果手臂在水中是向前伸展则阻力会随之增加而向后方的反作用力也会出现，二者都会产生负加速度。
If an arm is stretched forward under water resistance is increased and a reaction force back ward is developed both of which would contribute to negative acceleration.
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