1.
Kepler's second law means that a planet's orbital speed changes with its distance from the sun.
开普勒第二定律指行星的轨道速度与其和太阳的距离。
2.
OVM (Orbiting Velocity Meter)
沿轨道运行速度测量器
3.
the acceleration toward the center that holds a satellite in elliptical orbit.
在卫星椭圆轨道上面向中心的加速度。
4.
moving in its orbit with the gleam and the speed of light.
以光的速度在它的轨道上运行着。
5.
Design of Tramcar Speed Measuring and Record-Analyzing Instrument;
轨道矿车速度测量记录分析仪的设计
6.
T he influences of some parameters, such as rail surface irregularity wavelength, track mass, track rigidity and track viscosity, on the critical speed and the tr ack wave propagation are analyzed.
分析了轨面不平顺波长、轨道质量、刚度、阻尼等参数对轨道临界速度及位移波的影响。
7.
Influence of Vehicle Speed on the Dynamic Characteristics of Vehicle-Track-Subgrade System
列车速度对车辆—轨道—路基系统动力特性的影响
8.
Smoothness Control of the Ballastless Track of High Speed Railway
高速铁路无砟轨道铺设平顺度控制浅析
9.
The acceleration may in turn be obtained from the velocity of the satellite and the radius of the orbit.
这个加速度又可根据卫星的速度和它的轨道半径来求得。
10.
photometric orbit
光度轨道 -食双星
11.
and welded rails have begun to replace jointed rail. all these developments permit higher speeds and a smoother ride.
焊接轨道已开始代替有接头的轨道。所有这些技术使火车的速度更快，行驶更平稳。
12.
A Study on the Switching and Its Controlling of the Switch and Nose Rails in High-Speed Turnout;
高速道岔尖轨与心轨转换及控制研究
13.
In a Jovian stationary orbit, a spacecraft goes around the planet at the same speed as the ionosphere.
在木星的同步轨道上，太空船环绕行星的速度与电离层相同。
14.
A rocket must attain a speed of about five miles per second so that it may put a satellite in orbit.
火箭必须获得每秒大约五英里的速度以便把卫星送入轨道。
15.
Let us calculate the velocity required for such an orbit, and the time of one revolution.
现在我们计算圆轨道所需的速度，以及运转一周所需的时间。
16.
Theoretical analysis of long floating slab track(part Ⅰ)--dispersion graph and critical velocity
长型浮置板轨道隔振系统理论分析(Ⅰ)——弥散曲线及临界速度
17.
The Importance of Suburban Railway Planning in Large and Medium-sized Chinese Cities
从我国大中城市规模的发展速度看市郊轨道交通规划的重要性
18.
Temperature Measurement and Temperature Stress Analysis of Ballastless Track Slab
无砟轨道轨道板温度测量与温度应力分析