principal element

The principal structural element in magnetism is the domain.

在磁学中的主要结构单元是磁畴.

At the same time, from the basic theory of mechanics of materials, particularly expatiate the material secant stiffness of the principal strain direction and the principal stress direction and the element transformation matrix; they provide the theory basis of the procedure presented in this paper.

同时由材料力学出发详细推导了主应变或者主应力方向上的材料割线刚度、单元坐标转换矩阵，为本文程序的编制提供了理论基础。

Basic fund is the principal and crucial element of basic pension system.

基金是基本养老保险制度之本，是基本养老保险制度的决定性因素。

ANODE, The element toward which the principal stream of electrons flows.

正极, 主电子流向的极位.

The chief element or ringleader is responsible for all crime of mob, while the general principal offender is responsible for those that involved himself.

犯罪集团的首要分子对集团所犯全部罪行承担刑事责任，一般主犯则只对其参与、组织、指挥的全部犯罪承担刑事责任。