Basic concept, operational principle of the virtual periscope, research and progress of the virtual periscope in the U. s are discussed in detail.

对虚拟潜望镜基本概念、工作原理和美国在虚拟潜望镜方面的研究及进展作了详细的论述。

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Basic concept, operational principle of the virtual periscope, research and progress of the virtual periscope in the u.

对虚拟潜望镜基本概念、工作原理和美国在虚拟潜望镜方面的研究及进展作了详细的论述。

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First of all, the nonlinear equation of structure is presented in this paper based on virtual work principle. It is thought that the Updated Lagrangian Formulation u.

首先，本文基于虚功原理，推导了结构几何非线性方程，指出更新的拉格朗日列士法U。

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So she decided to take an online U. S. history course this summer from the Virtual High School, said her mother, Paulette de la Veaux.

因此，她母亲宝拉?德拉沃克斯说，她决定要在虚拟高中里选修一门美国历史课。

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So she decided to take an online U. S. history course this summer from the Virtual High School, said her mother, Paulette de la Veaux.

因此，她母亲宝拉?德拉沃克斯说，她决定要在虚拟高中里选修一门美国历史课。

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