Since it is not easy to judge the direction of force in a fall, much less the extent of force, the belayer must evaluate each situation and make use of the rock for the most secure position.
由于在降落过程中很难判断受力的方向，更不用说受力的大小，因此保护者必须对每一种情况进行估量，并利用岩石取得最安全的位置。
By investigating the direction of force acted upon particles and the direction of fluid flow in the classifier, the concepts of cross flow classification and reverse flow classification were proposed.
考察了分级过程中颗粒所受的力场和介质流体的流动场，分析和比较了与之对应的两种不同形式的分级，即颗粒物料的逆流分级和错流分级。
Under the control of the Sun's gravitational force, each planet maintains an elliptical orbit and all of them travel in the same direction.
在太阳引力的控制下，每个行星都维持在一条椭圆形的轨道上，并按照相同的方向移动。
Clearly globalization is a complex set of partly contradictory forces. It is not, as globalization critics suggest, a single force pulling in a single direction.
很显然全球化是有些相互矛盾的力量进行一种复杂的适应。它不是像一些全球化的批评人士所说的一种力量往一个方向前行。
Work is defined as the product of a force and the distance through which its point of application moves in the direction of the force.
功的定义是力和力的着力点沿力的方向移动的距离的乘积。
That means if you put an object in there that is completely immobile and you leave it in that force field, well, of course it might accelerate in some direction but it won't start spinning.
这就意味着，假如你将一固体固定在这个力场中,然后在力场中释放它，它有可能会朝向某一方向加速运动,但它绝不会旋转。
Here the deep shouts which proceeded from the direction of the Halles burst out with fresh force of bell and uproar.
此刻来自菜市场方面的沉闷的呼叫声、钟声和嘈杂的声音同时加剧起来。
The results showed that the proposal can not only control the direction and value of rotary steering force effectively, but it has a simple structure and high reliability.
作者认为，这种导向工具设计方案不但能够实现旋转导向力方向和大小的有效控制，而且结构简单，可靠性好。
The direction of motion can be changed by the action of another force on a body.
在物体上作用另一个力，可以改变物体的运动方向。
A simple device, such as a lever, a pulley, or an inclined plane, that alters the magnitude or direction, or both, of an applied force; a simple machine.
机械装置一个简单装置，如杠杆、滑轮或斜面刨，可以改变作用力的大小或方向或同时改变；简单机械装置。
The acceleration produced by an unbalanced force acting on an object (or mass) is directly proportional to the magnitude of the force and in the direction of the force.
译文：加速度是由于受到作用在物体（或质量）上的非平衡的作用（力）而产生的，其与力的大小成正比，方向沿力的方向。
This can be avoided by meticulous attention to the placement of retractors and the force and direction of retraction.
密切注意牵开器的安放、力量以及牵开方向能避免这些损伤。
In finite elastic deformation, the direction and the density of the boundary force can greatly change with the deformation of the elastic body.
在有限弹性变形中，边界力的方向与密度将随弹性体的变形而发生显著变化。
As a result of its change of direction across the blade, the steam will impart a force to the blade.
由于蒸汽通过叶片时改变方向，结果对叶片产生了作用力。
The tail reacts to that change of direction in the primary force (the ball moving), yet it is delayed due to the resistance of momentum.
尾部对主要力（球体运动）的方向变化产生反作用，只是这种作用由于动力的影响而受到了延迟。
The simulation of the valve plate has been worked, and it can be used as the direction for the design of SCCS and the unloader force.
对该系统中气阀阀片的运动规律进行了模拟，对可调回流气阀的机构和加载力设计起了指导作用。
Each subscript refers to a coordinate which represents the location and direction of a force or of a displacement.
每一脚标指的是代表一个力或一个位移的位置和方向的坐标。
Our intuitive concept of force includes such ideas as place of application, direction, and magnitude, and these are called the characteristics of a force.
力的直观概念包括力的作用点、大小、方向，这些被称为力的三要素。
The result mean: the cutting force affected more by species, cutting direction, the size of saw blade, Angle parameter and the depth of cutting when making no dust cutting experiment by wedge saw.
研究证明，楔型刀锯进行木质材料无屑切削时，其切削力受木材的树种、切削方向、锯片尺寸、角度参数及切削用量的影响较大。
From the common mechanical phenomenon, present a theoretical method on how to judge the direction of static friction force.
本文以常见的力学现象为例，从理论上阐述判断静摩擦力方向的方法及作功问题的证明方法。
If the direction of the force is not the same as that of the velocity, the body is deflected sideways and moves in a curved path.
假如力的方向与速度方向不同，物体就偏向一边，而作曲线运动。
The results show that this kind of steering tool can not only realize the control of the magnitude and direction of the bias force, but also is simple in structure and high in reliability.
结果表明，这种导向工具设计方案不但能够实现旋转导向力方向和大小的有效控制，而且结构简单，可靠性好。
The paper discusses the influence of the direction and strength of force, the angles of the bat and spinning on the balls flying curve.
根据乒乓球运动中击球时用力方向、拍面角度、发力大小、旋转性能等方面阐述对球的飞行弧线的影响。
The analysis of forces exerted on material on vertical section shows that there should be an Angle between the vibrated force direction and crosswise of separation bed.
物料在纵断面上的受力分析表明：分选机激振力方向应与分选床横向有一定角度。
The function of humanity force is also in line with the theory of three elements: strength, direction and functional point.
人文力的作用同样遵循着大小、方向、作用点的三要素原理。
A change in the direction of a motion requires a force as does a change of speed.
改变运动方向正象改变速度一样需要外力的作用。
A change in the direction of a motion requires a force as does a change of speed.
改变运动方向正象改变速度一样需要外力的作用。
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