您要查找的是不是：
- the system of mass point 质点系
- A design on the testing system of mass center of engines, including its software and hardware are described in detail. 摘要介绍了发动机质心测试系统的基本构成以及其软硬件的设计实现。
- A integrated equation set for solving plane-parallel motion of rigid body was derived, and the conditions of system of forces simplified on the center of mass plane was discussed. 给出了解决刚体平面平行运动问题的一组完整方程,讨论了力系简化在质心平面内的条件。
- These two aspects basically include the system of organizing, sports club, sports instructors, people"s corporeity inspecting, scientific research and laws of mass sports. 这两大方面主要包括:大众的组织管理体制、体育俱乐部、体育指导员、有关国民体质监测、大众体育科研以及大众体育法律法规几个方面。
- The change of the moment of momentum of a system of particles with respect to the center of mass only involves the external forces acting on the system, not the internal forces. 质点系相对于质心和固定点的动量矩定理，具有完全相似的数学形式，而对于质心以外的其它动点，一般并不存在这种简单的关系。
- On these islands a system of barter is used. 在这些岛上仍然实行着物物交换的制度。
- The two systems of government are polar opposites. 这两种政体正好相反。
- There must be a system of mass supervision so that the masses at large and the Party rank and file can supervise the cadres,especially the leading cadres. 要有群众监督制度，让群众和党员监督干部，特别是领导干部。
- A practitioner of a system of logic. 逻辑学家使用某一逻辑体系的人
- There must be a system of mass supervision so that the masses at large and the Party rank and file can supervise the cadres, especially the leading cadres. 要有群众监督制度，让群众和党员监督干部，特别是领导干部。
- Advocacy of such a system of government. 联邦主义这种政府体制的主张
- I prefer this system of teaching English. 我喜欢这一种英语教授方法。
- A system of roads radiates from the town center. 一个道路网从镇中心向四面八方伸展出去。
- A system of optical components that magnifies. 能起放大作用的一组光学元件
- A system of pipes, such as those used in plumbing. 管道，管线，管道网一管道系统，如那些用来铺设铅管的
- The bone structure or system of an animal. 骨结构动物的骨构造或系统
- The optical system of the eye stimulate cell of the retina. 眼睛的视觉系统刺激视网膜内的细胞。
- A cable or system of cables for a cable car. 缆索缆车的一根缆绳或索道系统
- A law court or system of law courts; a judiciary. 司法，司法系统法庭或法庭制度; 司法系统，司法部
- The monetary system of some countries used to be based on gold. 过去有些国家的货币制度是金本位制的。
