监督

In this paper, the concept of network security and security structures of OSI and Internet is introduced, and various threats confronting the computer network are also discussed. Several kinds of network information security technologies, including firewall technology, virtual private network, intrusion detection system, data encryption technology, identity authentication and security protocol etc. are also examined. The security of internal network is the biggest problem in the construction of each network. The solution to this problem lies in setting up a firewall. The theory of a firewall and the approach to its actualization is studied. Intrusion detection system, an important part of the computer network security system, has gained extensive attention. IDS monitors the computer and network traffic for intrusion and suspicious activities. It not only detects the intrusion from the extranet hacker, but also the intranet users. The emergence of virtual private network paves the way for realizing secure connection of LAN quickly and at a relatively low cost. The concept, function, key techniques, including the tunnel technology, and the ways to realize VPN are expounded in this paper. Also introduced is the data encrypt network technology, which is called the soul of computer network security, such as digital digest, digital signature, digital certificate, digital encrypt arithmetic and so on. At the same time, the principle and the process of implementing network security by digital certificate and digital signature, the basic principle and characters of security protocols, and finally, three of the security protocols, concerning the security problems in network, IPsec, SLL and SET are analyzed in detail Computer network system should be a system of dynamic defence, both dynamic and static, passive as well as active, and even offensive, combined with management and technology.

本文系统地介绍了网络安全的概念、OSI及Internet的安全体系结构，并讨论了计算机网络面临的各种安全威胁；内部网络的安全问题是每个建网单位面临的最大问题，可以认为防火墙技术是解决网络安全的一个主要手段，本文研究了防火墙的原理及其实现手段；作为一种主动的防御措施，入侵检测系统作为网络系统安全的重要组成部分，得到了广泛的重视，TDS对计算机和网络资源上的恶意使用行为进行识别和响应，不仅检测来自外部的入侵行为，也监督内部用户的未授权活动；虚拟专用网技术的出现，为实现网络间的连接提供了快速安全但又相对便宜的手段，本文较深入的探讨了实现VPN的隧道技术，并对VPN的概念、功能、实现途径、基本构成、关键技术及发展前景等问题进行了全面论述；数据加密技术是网络安全核心技术之一，本文从数据加密算法、数字摘要、数字签名及数字证书等几方面简要介绍了数据加密技术，并分析用数字证书和数字签名实现网络安全的原理和过程；对安全协议的基本原理、主要特点进行了较为深入的研究，并就网络的安全性问题剖析了三种安全协议：IPsec协议、SLL协议和SET协议。

Unlike policemen, they are not called away to supervise a parade or protect a dignitary.

和警察不同，他们并没有被叫去监督游行或者保护高官。

I have positive work attitude and be willing and able to work diligently without supervision.

我有积极的工作态度，愿意和能够在没有监督的情况下勤奋地工作。

Have positive work attitude and be willing and able to work diligently without supervision.

有 的工作，愿意并能够在监督的情况下勤奋地工作。

He has a positive work attitude and be willing and able to work diligently without supervision.

他有积极的工作态度，愿意并且能够在没有监督的情况下勤奋工作。

He has a positive work attitude and be willing and able to work diligently without supervision .

他有积极的工作态度，愿意和能够在没有监督的情况下勤奋地工作。

Have positive work attitude and be willing and able to work diligently without supervision .

有积极的工作态度，愿意和能够在没有监督的情况下勤奋的工作。

Company will strictly of the direct examination scoops out in the production, sale, each link in etc.

公司将严格的监督检验挖掘在生产、销售、售后服务等各个环节，同时，一批高素质的技术人员和职工队伍，兢兢业业的工作，使产品不断更新。

Therefore strengthen examination station direct management meaning graveness.

因此，加强检测站监督管理意义重大。

Direct election by workers of union leaders was rare, occurred only at the enterprise level, and was subject to supervision by higher levels of the union or Communist Party organization.

直接选举的工人的工会领导人中是罕见的，只发生在企业层面，并受到监督的更高水平的联盟或共产党组织。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。