This is the first main crux of dynamic theory.

这是动态学说第一个主要的难题。

Based on orbit dynamic theory, the close interception model was set up.

根据轨道动力学理论，建立了近距离空间拦截轨道的数学模型。

Cluster warhead dispersing technique is analyzed with gas dynamic theory.

用气体动力学理论分析了子母弹抛撒技术。

This paper deals with problems about thermo-dynamic theory of coal-seam gases.

本文讨论了有关煤层气体的若干热力学理论问题。

Based on structural dynamic theory, the resonance mechanical model is established.

根据结构动力学理论，建立了边坡共振的力学模型。