Relativity is useful in its domain of velocities near the speed of light.
相对论是在其速度接近光速的速度域有用。
As a whole, the groups with BRGs tended to have more galaxies which were more luminous, and had a greater variety of velocities.
总的来说，含有BRG的星系群倾向于含有更多的明亮星系，在周转速度上的差异也更大。
In this paper the problems of velocities and accelerations of points for tree-shaped multi-rigid-body systems are discussed.
本文研究了树形结构多刚体系统点的速度与加速度问题。
Act returns a pair of velocities - translational and rotational (in that order) - that show the action it wants the motor to take.
act返回两个速度(依次为平移速度和旋转速度)，表示希望发动机执行的动作。
The author deals with the flow of fluid through a pipe with narrow groove, and obtains the distribution of velocities in the flow field.
本文研究了流体流过带有狭槽的管道的流动问题，得到了流场中的速度分布规律。
Using transformation of velocities and time dilation, Thomas precession is derived and applied to deduce the spin-orbit interaction energy.
利用速度变换给出托玛斯旋进，并应用于玻尔氢原子；利用时间膨胀给出托玛斯角速度；最后计算轨道自旋相互作用能．。
Mathematical expressions of velocities, shear stresses for Newtonian laminar field near the pins in pin barrel extruder and machine's power are presented.
基于牛顿流体模型，给出销钉机筒挤出机内销钉附近流场的应力分布和速度分布的数学表达式，提出销钉消耗功率的计算方法。
We also obtain the variation of the radial dispersion of velocities with r through the stability of the density wave in three-dimensional dishlike galaxies.
同时，从三维盘状星系密度波的稳定性讨论推出了径向速度弥散度的变化规律。
In this paper, the conservation law of momentum is derived from Einstein's transformation law of velocities, Newton's second law in relativity and general conservation law of energy.
本文从爱因斯坦速度变换式、相对论中的牛顿第二定律及普遍的能量守恒定律导出质点组的动量守恒定律。
Expressions of velocities and accelerations in usual coordinates are simply derived by means of the composition formulae of velocity and acceleration in special rotation reference systems.
在一特定的转动参照系中，利用相对运动的速度和加速度合成公式，通过一特定的相对运动简洁地导出常用坐标系中的速度和加速度表达。
Based on the theorem for the composition of velocities in theoretical mechanics, the author gives out the demonstration of the theorem of three instantaneous centers of velocity in general conditions.
本文运用理论力学中运动学的速度合成定理，给出了一般情况下平面机构运动三心定理的求证过程。
By compiling a map of seismic velocities from thousands of earthquakes across the globe, they can also begin to map temperatures and densities throughout the mantle.
通过编制全球数千次地震的地震速度图，他们还可以开始绘制地幔的温度和密度图。
This organ has a remarkable ability to sense the velocities of flows.
这个器官有一个值得注意的功能，就是感受水流的速度。
By using telescopes in Chile, the astronomers measured Doppler shifts and thus velocities of gas in the Trifid.
利用智利的天文望远镜，天文学家测量了三裂星云中气体的多普勒频移和速度。
When we deal with collisions, the velocities of the objects before the collision are unprimed.
当处理碰撞问题，物体的速度，在碰撞前无撇号。
All this comes out of Doppler shift measurements: the velocities, the radii, the periods and even the masses of these objects.
顿移测量法得到，速度，半径：，周期，以及，这些物体的质量，如果作为观察者。
Whenever it is necessary to restart the simulation run, an appropriate set of positions and velocities can be reloaded.
在需要重新启动模拟时，可以加载一组合适的位置和速度。
Using radiation pressure and optical dipole forces, atoms that roam in gases at a few hundred meters per second are now routinely slowed down to velocities of a few millimeters per second.
光的电偶极辐射能够使正在空气中以每秒数百米飘逸的原子的速度迅速下降到每秒几毫米。
And these additional velocities that galaxies have that aren't due to the expansion of the universe are due to the uneven distribution of matter in the universe.
而这些星系的额外的速度，不是由于宇宙的膨胀，而是由于物质在宇宙中的分布不均匀。具体地说，我们的银河系正被附近的仙女座星系和室女座星系团拉扯着。
Periodically, the application writes out the positions and velocities of all the atoms under simulation (part of this stream of information was used to produce the synthetic video mentioned above).
应用程序会定期记录模拟中的所有原子的位置和速度(此信息的一部分用于生成上面提到的合成视频)。
In the early 1970s, Vera Rubin made observations of the velocities of stars that imply dark matter exists.
早在1970年代初，Vera Rubin对星系旋转速度的观测暗示了暗物质的存在。
If the stars and gas that we can see inside galaxies are only a small portion of their total mass, then the velocities make sense.
假设我们在星系中看到的星球和气体只占了星系总体积的一小部分，那么像这样的速率就说得通了。
Professor Mobasher and his team identified member galaxies of this cluster and measure their distances and velocities.
莫巴舍尔教授及其团队确定了组成该星团的星系并测量了它们的距离和速度。
The homunculus in Maxwell's original thought experiment could sort the molecules of air found in two connected boxes according to their velocities.
在麦克斯韦尔最初的思考实验里，侏儒按照空气分子的初始速度把分子放在了两个互相连接的盒子里。
In a few locations, though, the velocities changed by as much as 20 MPH because of minor redirections of the winds near the storm's center.
不过，在一些位置，由于接近风暴中心的风轻微变向，风速变化多达每小时20公里。
So to get into the center-of-mass frame, you must subtract the velocity of the center of mass from the initial velocities.
要进入重心体系，你就必须减去速度，重心的速度，从原始速度中减去。
"About 5% of the stars had very peculiar velocities," Olsen says. "We were definitely surprised.
“大约5%的恒星有着异常的速度，”奥尔森说，“我们大为吃惊，我根本没有料到会有这样的情况。”
"About 5% of the stars had very peculiar velocities," Olsen says. "We were definitely surprised.
“大约5%的恒星有着异常的速度，”奥尔森说，“我们大为吃惊，我根本没有料到会有这样的情况。”
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