in and out system

基本解释

For a Linux system connected to a network, a firewall is the essential defense mechanism that allows only legitimate network traffic in and out of the system and disallows everything else.
对于连接到网络上的 Linux 系统来说，防火墙是必不可少的防御机制，它只允许合法的网络流量进出系统，而禁止其它任何网络流量。
School's human resources are the teaching staff in and out school system who have the abilities of teaching, researching and managing, and are the most important resources in modern school.
学校人力资源主要是指学校系统内外具有教育、教学、科研和管理能力的教职工，是现代学校管理最根本、最核心的资源。
They might also want to restrict the network traffic in and out of their system, so that only the traffic from trusted sources can enter their system and only authorized traffic can go out.
他们可能还想限制进出其系统的网络流量，以便只有来自可信源的流量才可以进入其系统，以及只有授权的流量才可以出去。

The fish that,for one reason or another, that found their way past the barrier, we suppressed them and try to take them out of the system to keep them from establishing in Lake Michigan."
All right, so this is the heat flowing in or out of the system, and these are all functions of state.
好的，这就是系统的热量变化,这些都是态函数。
麻省理工公开课 - 热力学与动力学课程节选
So the temperature is intensive, and you can make intensive properties out of the extensive properties by dividing by the numberof moles in the system.
所以温度是强度量，你可以通过,除以系统中物质的摩尔数,来从广延量中导出强度量。
麻省理工公开课 - 热力学与动力学课程节选

Yet it was just a dress rehearsal, a favor from Western energy companies, to help traders at Gazprom's new London trading desk learn how to put in place agreements between buyer and seller, work out kinks in the system and go through the process of finding and negotiating for cargo and locating a home for it.
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