必要性

At first,there are three kinds of satellite recon information flow models are built,they are focus,narrow bar scan and wide bar scan.And the examples of them are given according the parameters of "Starlite" recon satellite constellation of USA.Secondly,the information capacity of the recon-sat storage without satellite transmission network is simulated and computed,which illustrates satellite transmission network is necessary.Lastly,the transmission of satellite recon information through a satellite transmission network is simulated and some primary simulation conclusions are given.

首先建立聚束、窄条带扫描、宽条带扫描等三种模式的卫星侦察业务流量模型，并参考美国Starlite侦察卫星星座的指标参数进行了计算举例；其次仿真计算了无卫星传输网络时侦察卫星星载存储器的信息量状况，指出卫星传输网络的必要性；最后仿真卫星侦察信息在卫星传输网络下的传输情况，并给出初步的仿真结论。

This paper studies some communicative problems necessary for accommodating-err mechanism between management station and management agent, as well as necessary for synchronism mechanism to lead in.

研究了管理站点和管理代理通信中存在的一些需要容错的问题以及管理代理和监控模块间通信引入同步机制的必要性，论述了4种被动容错机制和1种主动容错机制以及信号灯机制的设计和实现过程。

The first chapter, the Introduction, will make a description with five case studies on the use and misuse of statistical estimate methods in the regional economic studies, in order to reveal the objective, significance and necessity of this dissertation, and also, the basic structure of the conducted research.

作者首先从5个具体实例着手，描述统计测度方法在区域经济研究中的应用和误用，阐明撰写本文的目的、意义、必要性和全文研究的基本框架。

This text makes the basic theories problem of the related society security as the studying point of departure, and clarifies the theories foundation of the society security tax, and through drawing lessons from the international social advanced experience, combined actual circumstance of our country, clarifies the necessity and possibility to lay the social security tax in the our country, and on the foundation of the first step design of the basic frame of the social security tax, further puts forward to need to be adopted of related integration in laying social security tax .

本文以相关社会保障基本理论问题为研究起点，阐明了社会保障税的理论依据，通过借鉴国际社会的先进经验并结合我国的实际情况，阐明在我国开征社会保障税的必要性与可能性，并在对社会保障税税制基本构架进行初步设计的基础上，进一步提出了需要采取的与开征社会保障税相关的配套措施。

As a postgraduate student who majors in translation theory and practice, I have never stopped the process of teaching myself the knowledge necessary for me to develop for my future.

作为一名从事翻译理论和实践研究的学生，本人深知加强自我学习对将来发展的必要性，所以始终没有中断对自我的磨练。

The present study introduces ro-ro passenger ships, its development in home and abroad as well as its safety transportation specifications. From both the qualitative and quantitative study point of view, it discusses the necessity and urgency of researching on the problem of vehicle safe stowing and securing.

本文介绍了客滚船及国内外滚装运输的发展情况和国内外对客滚船舶运输的安全规范，从定性和定量角度提出并讨论了研究滚装船系固问题的必要性和迫切性。

In this paper, we give the main requirements of the web-based course resource management system and provide the data stream charts of the key function modules.

本研究主要总结了已有的同类型网络课程资源管理系统的优点与缺点，阐释了本研究的重要性和必要性，对网络课程中的资源管理系统的需求进行了分析，给出了关键功能模块的数据流图，介绍了ASP。

More and more people in the world has recognized the necessity of strengthening environmental protection.

世界上越来越多的人认识到加强环境保护的必要性。

More and more people in the world come to realize the necessity of strengthening the protection for environment.

世界上越来越多的人认识到加强环境保护的必要性。

More and more people all over the world make aware of the necessity of strengthening environmental protection.

世界上越来越多的人认识到加强环境保护的必要性。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。