the System Evolvement Theory的用法和樣例：
例句
- But rare is the book on evolution theory that tells the story of steadfastness.
不過，關於演化理論的書很少講述穩定的故事。 - 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.
摘要以恆星結構與演化理論中常用的混合程理論為基礎，將湍流作用表現出來的宏觀應力引入恆星結構與演化模型中的流體靜力學平衡方程。
