And, to say that the motion actually stays in that plane forever means that this guy will not change direction.
那么说运动将永远保持在平面上，这意味着它的方向不会改变。
So, if you just look at the position vector, and the velocity vector for any motion at any given time, then together, they determine some plane.
如果你看一下任何时刻运动时的，位置矢量和速度矢量，它们决定了某个平面。
According to Einstein's theory, the clock on the plane would be expected to have lost time, due to being in motion over 80 hours compared to the clock on the ground.
按照爱因斯坦理论，相对于地面上的时钟，飞机上的时钟会因为80个小时的运动而减少时间。
So, what Kepler's second law says is that the motion of planets is, first of all, they move in a plane.
开普勒第二定律说到，首先每个行星的运动都保持在同一平面内。
If you want, it's the plane in which the motion seems to be going at the given time.
如果你愿意的话，这是在给定时间，行星运动的平面。
The TLP plane motion, stability, redistribution of tether force and dynamical factor has been viewed, during the rupture of one leg.
观察了单腿破断时张力腿平台的平面运动、稳性、张力的重新分配和动力系数。
Fire up those 3-d SDL libraries, map the drawing surface onto a plane, and you can have full-motion video as an aspect of your 3-d world.
利用那些3dsdl库，可以将绘制表面映射到一个平面，并让运动视频成为3d环境中的一个面。
In the case of plane motion, the phase plane method can be used to analyse the motion qualitatively.
对于平面运动的特殊情形，可在相平面内进行定性分析。
The vector projection method is a graphical technique for motion analysis to the plane mechanism.
向量投影法是一种对平面机构进行运动分析的图解方法。
Device used to move automatic guns in a vertical plane. A reversing or reciprocating drive system provides motion.
喷枪在垂直面自动移动的装置，一个回动的或往复式的提供移动的装置。
An optical flow based approach was presented to estimate coronary arterys two-dimensional motion from a sequence of single-plane angiographic images.
采用光流法，由单面冠状动脉造影图像序列估计冠状动脉血管的二维运动。
Kinematics and dynamics of mechanical systems including rigid bodies in plane motion.
机械系统的运动学与动力学包括刚体的平面移动。
Introducing the dynamic simulation of ADAMS, Bringing forward a method of analyzing the plane mechanism motion using the technology of simulation.
简要介绍了ADAMS动态仿真功能，提出了应用仿真技术对平面机构进行运动分析的方法。
Chapter four: on the plane vertical motion with delay.
第四章：关于带有时滞的飞机纵向运动问题。
The pattern solution of the plane motion of rigid body with complex number method is provided.
本文介绍了一种用复数方法求解刚体平面运动的模式化解法。
In the paper the authors introduce the design methods of interactive software for analysis of motion and dynamics in plane linkage.
介绍了平面机构运动分析和力分析交互式软件的设计思想、设计功能与设计方法。
In this paper, the author discusses some main questions in using relative motion graphic method to analyse the movement of plane mechanism, and tries to expound some laws in it.
本文就用相对运动图解法作平面机构运动分析中涉及到的主要问题加以讨论，并竭力阐明其中一些规律性的东西。
The problems associated with motion control system and data processing system in plane measurement were studied.
主要研究了测量运动控制系统和数据处理系统在平面测量时的相关问题。
The formulas are derived for the conditions of concrete blocks absolute-stability and quasi-stability according to the equations of stiff-body motion on plane.
并由刚体平面运动方程，推导出混凝土护坡板的绝对稳定和准稳定条件关系式，以确定护坡板的尺寸。
Taking plane curve machining for example, the motion schemes of machine tools with two freedoms are presented.
以平面曲线加工为例，给出了所有两自由度机床的运动方案。
The border panoramas are created by constraining viewpoint motion to arbitrary convex region of a plane, and sampling cylindrical panoramas at border of the region point by point.
边界全景图通过限定视点在平面上任意的凸区域内运动，并且在区域的边界上逐点采样柱面全景图而构成。
The applicability of the plane curvilinear motion acceleration formula to general curvilinear motion is discussed.
讨论了平面曲线运动加速度公式在常见曲线运动中的适用性。
The symmetry algebras of 1 + 1 dimensional nonlinear evolution equation arising from the motion of plane curve in affine geometry are systematically studied.
系统地研究了来自于射影几何中平面曲线运动的1 + 1维非线性方程的对称代数。
With the help of complex number operation, the author has developed a method for designing the contour of a CAM whose follower keeps a general plane motion.
本文利用复数表示法，得出从动转子中心作平面一般运动情况下的凸轮廓线的设计方法。
The moments of momentum of plane motion rigid body in three different situations are analyzed and discussed and general form of equation of moment of momentum is obtained.
对三种情况下平面运动刚体的动量矩进行了分析和讨论，得到一般形式的动量矩方程。
On analyzing the longitudinal plane motion equation and lateral plane motion equation in guided phase, the guidance logic for perpendicular impact task was devised.
通过分析导弹在导引段的纵向平面运动方程和侧向平面运动方程的特点，设计了实现垂直打击任务的制导逻辑。
On the basis of it, the method of establishing the mathematical model is also suitable for calculating the reliability of motion of plane multi bar linkages by changing the parameters of the model.
并在此基础上通过改变模型参数，使该建模方法同样适用于解决平面多杆机构的运动可靠性问题。
On the basis of it, the method of establishing the mathematical model is also suitable for calculating the reliability of motion of plane multi bar linkages by changing the parameters of the model.
并在此基础上通过改变模型参数，使该建模方法同样适用于解决平面多杆机构的运动可靠性问题。
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