And then between the system and the surroundings is the boundary.
系统和环境之间的，是边界。
If we say we have a system, and it's in its surroundings.
如果我们有一个系统，它在环境中。
And so, we can immediately write this du and then we can write du for the universe, which is system plus surroundings is equal to zero.
因此，我们可以立刻写出这个等式，然后可以写出总的的，也就是系统加环境的du，等于零。
The star system, located only 400 light years away, is distinguished by its colorful surroundings, which include a red emission nebula and numerous light and dark brown dust lanes.
这个恒星系统在400光年远处，以多彩的环绕物质而著名，包括一个红色发射星云和众多深棕、浅棕色的尘带。
The system consists of 6 grade I indexes and 20 grade II indexes as policy management, surroundings risk, owner risk, deviser risk, supervisor risk and contractor risk.
该体系由政策风险、环境风险、业主风险、设计者风险、监理者风险、承包商风险等6个一级指标及其20个二级指标组成；
This essay discusses the problems and methods of solving in about credit system in order to reduce credit risk, complete credit system, and establish a faithful social surroundings.
针对信用体系的现状、存在问题及解决问题的对策进行探讨，意在降低信用风险，完善信用体系，营造诚信的社会环境，加快社会信用体系的建设步伐。
But because of its power system and working surroundings, it must be installed the protection system.
但是其动力系统及其运行环境决定缆车系统必须具有高可行性，必须安装安全保护装置。
The reference blackbody cavity was employed to calibrate the system and the vacuum cooling water bath system was used to decrease the influence of surroundings.
参考黑体用于对系统的标定，水浴环境腔体和真空系统用来消除环境和大气的影响。
The goal to meet the public demand of scientific healthy system is to perfect exercising surroundings, to enhance the level of coaches and to set up the network of the public aerobics clubs.
改善健身环境，提高教练员指导水平，建立大众健美操俱乐部网络平台，是满足大众需求的科学健身体系的目标。
This paper aims at the surroundings of automobile light system, divided into three parts, designs and analyses drivers with different voltage structures.
本文针对汽车照明系统的用电环境，分成三部分设计和分析了不同电压结构的驱动电源。
Reverse engineering has become possible or distorted wilfully for software system in malicious host surroundings, the security, integrity and availability of software system are threatened.
在恶意主机环境下，主机可以对软件系统进行逆向工程或者肆意的篡改，其安全性、完整性与可用性都受到了很大的威胁。
A system of void Spaces introduces a spatial configuration which brings daylight into the cube, and views between the surroundings.
吹拔空间系统采用了将阳光和周围景致带进立方体的空间构型。
And that sound-location system could help to build up an even more complete sound picture of a blind person 'surroundings.
而且那个超声定位系统可以帮助他们建立起周围环境的更为完全的声音图象。
To ensure the safety of the car, the driver should be monitored and controlled by the safety warning system of the car's driving in accordance with the driving state, time and surroundings.
汽车安全驾驶警告系统能根据驾驶员的驾驶状态、驾驶时间和驾驶环境等因素，对驾驶员进行监控，确保行车安全。
Action parameters are quickly stored in the testing system, and the problem that the projectile-borne mechanism is influenced by the surroundings in the gyro simulation test is solved.
该测试系统能直接将动作参数高速存储，并较好地解决陀螺模拟试验装置中弹载机构受外界环境影响较大的问题。
The system establishes the network connecting enterprises with government regulators, improve management tools and surroundings for promoting management efficiency of occupational hazard.
系统建立了连接企业和各级职业危害监管部门的网络体系，为改善企业职业危害管理的水平和效率提供了手段和环境。
They are supported by a 3d sonar system which, as with dolphins, allows communication with their surroundings and with other robotic penguins - for example to avoid collisions.
这种工具有一个3d的海豚音声纳系统，使得“企鹅”可以与周围的伙伴们交流，比如避免互相碰撞。
It lies in the center of the WuHan East-lake New and High Technology center, with beautiful surroundings, perfect fundamental facilities, self-contained service system.
武汉大学科技园位于武汉东湖高新区科技新域的中心地带，邻湖，环境优美、基础设施完善、服务体系完备。
It lies in the center of the WuHan East-lake New and High Technology center, with beautiful surroundings, perfect fundamental facilities, self-contained service system.
武汉大学科技园位于武汉东湖高新区科技新域的中心地带，邻湖，环境优美、基础设施完善、服务体系完备。
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