轨道的

To the quality of the 3 power of 10 kg satellite launched into a circular orbit near the ground, if produced by incomplete combustion of fuel, 1% of heat into a satellite in orbit at the time of kinetic energy, fuel quality test for m at least how much?

要把质量为10的3次方千克的卫星发射到地面附近的圆形轨道上，如果燃料完全燃烧产生的热量有1％转化为卫星在轨道上运行时的动能，试求燃料质量m至少为多少？

The total gravity force on the star from the stars enclosed by its circular orbit can be treated as if they are concentrated at the center.

对于一个离中心为 r 的恒星来讲，来自轨道内的恒星的引力与把它们集中在星系中心的一样，来自轨道外的恒星的引力合力为零。

According to the characteristics of altimetric satellite's orbit, this thesis systematically studies the theory and methods of satellite altimeter data processing. The content includes the analysis of satellite's radial error in time domain and in space domain, the spectra characteristics of collinear tracks and crossover points distribution, the integral method and the computation and analysis of Topex altimeter data.

本文针对测高卫星轨道及地面轨迹所独有的特点，较系统地研究了卫星测高数据处理的理论与方法，内容涵盖了测高卫星径向轨道误差的时域特征分析与空域特征分析、共线轨迹与交叉点分布等的谱特征、整体求解法的研究以及Topex测高数据的初步计算与分析。

For a continuous map of trees or graphs to itself, we show the properties that every isolated chain recurrent point is an eventually periodic point, and an isolated chain recurrent point which is not in the orbit of a critical point and has no critical point in its orbit is a periodic point.

第三章主要讨论一些特殊连续统上连续自映射的孤立链回归点与最终周期点之间的关系，证明了对树或图上连续自映射，孤立链回归点是最终周期的，且如孤立链回归点不在临界点的轨道中，也无临界点在其轨道中，则此点必为周期的。

The first chapter the content examines including the orbital intensity calculated that reserves the axle seam the computation, in the curve reduces axle's arrangement, the axle festival general arrangement plan, the railroad ballast amount used computation, designs the road section and the station yard cubic meter of earth and stone quantity calculates as well as mixes, railroad cubic meter of earth and stone and orbital project construction organization and budget.

第一章内容包括轨道强度检算，预留轨缝的计算，曲线上缩短轨的布置，轨节布置图的绘制，铁路道碴用量的计算，设计路段和站场的土石方量计算以及调配，铁路土石方和轨道工程的施工组织及预算。

The intellectualized electromobile anticollision system is build up by infrared ray distance measurement,monolithic machinecontrol,acousto-optic warning,hydraulic pressure braking and SO on,which have simplicity structure and easy to link with new or oldelectromobil.When before the dangerous of crash,it can stop quickly and placidly.This avoide the accident of electromobil crash cornpletely and reduced economic losses and social influence infinitely.Which have improved coal mine safety quotiety and productivity andis the preferred scheme for pit transports.

由红外线测距、单片机控制、声光报警、液压制动等单元组成的智能化电机车防撞系统，结构简单，与新旧电机车安装连接方便，当发生撞车危险前能够自动实现迅速而平稳停车，彻底避免煤矿井下轨道运输过程中发生的电机列车相撞事故，极大地降低了因此造成的经济损失和社会影响，提高了煤矿的安全系数和生产效率，是煤矿井下大巷轨道运输的首选方案。

These phenomenon showed that there were interactions between the frontier orbits of TiO〓 semiconductor and the heteroatom. It give a further support to the new point of view drown by us that the DOS at the lower part of CB and the upper part of VB of semiconductor nano-TiO〓 was important to the photocatalytic activity.

说明了杂原子的前线轨道能级与TiO〓半导体的前线轨道之间有相互作用，从而进一步印证了我们提出的半导体光催化剂价带顶部和导带底部的能级密度对纳米TiO〓催化剂光催化活性有较大影响的新观点。

The orbit of Iapetus is also unusual, being tilted to the plane of Saturn's orbit by an unusually high fifteen degrees.

Iapetus还有其他无法解释的特征：Iapetus的发光部覆盖着无法说明的细长的经脉；Iapetus的运行轨道也很奇特，相比土星轨道平面，异常的高了15度。

Urban rail transport and land use is a complex interactive system, which could be coordinated developed basing on integrated plan. Beginning from planning aspect, construction costs and operating pressure can be lessened; urban rail transport will gradually achieve the profitable goal. In conclusion, research on coordinating development of urban rail transport and land use is full of crucial practical values.

城市轨道交通与土地利用是复杂的互馈机制，基于二者的一体化规划可实现其良性互动和协调发展，从规划入手，可以解决部分建设资金，减少运营压力，逐步实现盈利目标，因而对于城市轨道交通与土地利用协调发展的研究是具有重要的现实意义的研究课题。

By focusing on corresponding development of urban rail transit and land use,the paper analysis the effect of the land use north to the Huilongguan station on the northern segment of Beijing metro line 13. Some ideas are put forward to adjust Huoying land use and to harmonize passenger volume on Longze,Huilongguan and Huoying,summarizes the passenger volume effects of different land use along urban rail transit.

根据城市轨道交通与土地利用的互动发展关系，分析了北京城铁13号线北段客流分布不平衡的特点及成因，以回龙观站为代表分析了站北土地利用对客流的影响，提出整合回龙观、霍营站北土地利用，协调13号线龙泽、回龙观和霍营小区客流的设想，并总结了沿线不同的土地利用对城市轨道交通客流的影响。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷