the System Evolvement Theory的用法和样例：
例句
- But rare is the book on evolution theory that tells the story of steadfastness.
不过，关于演化理论的书很少讲述稳定的故事。 - Basee on the mixing-length theory of convection, macroscopical stress of the turbulence is used in hydrostatics equation of the stellar structural and evolutionary model.
摘要以恒星结构与演化理论中常用的混合程理论为基础，将湍流作用表现出来的宏观应力引入恒星结构与演化模型中的流体静力学平衡方程。
