Caterpillar Un-interruptive Power System 卡特彼勒不间断电源
un stable system 稳定系统
un conservative system 非保守系统
System Un Security 系统不安全性
un-equalizing economic system 非均衡经济制度
As a responsible member of the international community, China is struggling for reform of the UN and the global governance system so they are more effective and representative of the international community as a whole.
作为国际社会负责任的一员，中国正在为联合国和全球治理体系的改革而努力，使之更加有效，更能代表整个国际社会。
It based on the basic principle of un-touched measurement in this optics system, applies general theory and methods of optics, the problems and the solutions for practical application are discussed.
该系统基于光学系统无接触性测量的基本原理，运用光学测量的理论和一般方法，设计并讨论了在实际运用中存在的问题及解决办法；
Total arable land dynamic balance equation stipulates the control subject for the regional arable land system un-der the base of predictable technology and population pressure.
在可预知的技术进步和人口压力背景下，耕地总量动态平衡方程为区域耕地系统的状态规定了调控目标；
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