In particular, the interaction between the main actor and the system involves a boundary class.
尤其是主要参与者与系统的交互，其包含了边界类。
And then between the system and the surroundings is the boundary.
系统和环境之间的，是边界。
A theoretical calibration method for potential system with electric field boundary element method was introduced.
文中提出了一种用电磁场边界元法对电位法进行标定的理论标定方法。
The model is a free boundary problem for a system of partial differential equations.
该模型是一个偏微分方程系统的自由边界问题。
Research tradition is a system whose boundary is definite.
研究传统是一个边界确定的系统。
It often specifies the boundary of the system.
它通常界定了系统的边界。
These structures are hard to design by traditional boundary modeling system.
在以边界面表示的体造型系统中，难以设计这些复杂结构。
The closed system allows energy to transfer through the boundary but not mass.
闭系允许能量通过它的边界传递，但质量不行。
The closed system allows energy to transfer through the boundary but not mass.
闭系允许能量通过它的边界传递，但质量不行。
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