查询词典 at a speed of

Radio telescopes are relatively inexpensive; radio signals travel at the speed of light, faster than which nothing can go; and the use of radio for communication is not a short-sighted or anthropocentric activity.

射电望远镜相对来说是昂贵的，无线电信号以光速行驶，没有什么比起它能走的更快了；而且无线电对于传播的使用不是一种短视或者以人类为宇宙中心的行为。

This car is running at a speed in excess of 100km/h.

这辆车的速度超过了每小时100千米。

It's a well-known fact that electrons and atoms move at the speed of light, technically flickering in and out of existence.

这是众所周知的事实，提出电子和原子的速度轻摇曳在技术上存在出入。

A cable made of optical fibers that can transmit large amounts of information at the speed of light.

光纤制成的可以以光的速度传送大量信息的电缆。

"Science and technology have come to pervade every aspect of our lives and, as a result, society is changing at a speed which is quite unprecedented."

科学和技术已渗透入我们生活的每一个方面，其结果是使社会以前所未有的速度发生着变化。

Science and technology have come to pervade every aspect of our lives, and, as a result, society is changing at a speed which is quite unprecedented.

科技已渗入我们生活的每一个方面，其结果是社会以前所未有的速度发生着变化。

We have a conclusion: Compared with Average runoff in savageness condition before 1979 in The HuTuo River Basin, average runoff in savageness condition from 1980 to 2000 reduced at the speed of 2.59% per year.

经过分析比较，滹沱河区1980～2000年系列与1956～1979年系列的平均水资源相比，以每年2.59％的速度减少。

Both motor car and each trailer of HST were modeled as a multi-rigid-body system with two suspensions, and LVT was modeled as an assembly of track segment elements with 24 degrees of freedom. The vertical vibration matrix equation of the system was established on the basis of the principle of the total potential energy with stationary value in elastic system dynamics and the rule of "set-in-right-position" for formulating system matrixes, and then Wilson-θ numerical integration method was used to solve the problem. The dynamic responses of the system were calculated when the train runs at the speed of 200 km/h. And the effects of vertical stiffness of rail fastener and block pad on vertical vibration responses of the system were investigated.

其原理是：将高速列车的动车和拖车模拟为具有二系悬挂的多刚体系统；将弹性支承块式无碴轨道模拟为具有24个自由度的轨段单元的集合；基于弹性系统动力学总势能不变值原理及形成系统矩阵的"对号入座"法则，建立此系统竖向振动矩阵方程，并采用Wilson-θ数值积分法求解，计算速度为200 km/h时此系统竖向动力响应，研究轨道刚度对此系统竖向振动响应的影响规律。

Finally a computer routine based on SLDMINV has an ability of simulating the measurement of induction sonde in highly deviated or horizontal wells with a borehole and invasions at the speed of about 4 min/point and with an accuracy of about 3～5％.

现已可用基于SLDMINV的程序，以约4分钟/点的速度和3～5％的精度模拟有井、有侵入的大斜度井、水平井中的感应测井响应。

First, the grain will be increase at double speed, second, a large scale "structure" builds by collision and coalescence of favorably oriented particles (namely primary phase coalescence), third, primary phase entraps the eutectic structure.

分别研究了浇注温度、拉坯速度、冷却速度等工艺参数对合金组织的影响，结果显示：在本实验条件下，浇注温度以650荀70'℃为宜；拉坯速度以8.4一9.6 cm/min为宜；二次水冷流量控制在1.0一2.0比为宜。综合考虑磁场强度B和冷却速度对非树枝晶组织初生相平均尺寸D和形状因子S影响的数学表达式为：D=A一ns二；。

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。