文章主要介绍代数式求值的几种常用方法。
This essay mainly introduces several evaluation methods of algebraic expression in common use.
接着，分析过程代数式，提出流程的评价指标；
Then, by analyzing the process algebra, the evaluation criterions and the approach of BPR are made;
文中导出了五次代数式缓和曲线的参数方程和曲线各元素的公式；
The parameter equation and the formula of each element of the curve are set up and compared with that of clothoid.
五次代数式缓和曲线在线型质量上较回旋线有较大提高，应用上也非常方便。
The fifth power algebraic transition curve is good in alignment of a highway and easy in application.
为了应用，笔者编制了六次代数式缓和曲线系数表，并着重阐述了它在回头曲线中的应用。
For the purpose of application, the author tabulates the coefficient tables of transition curve of 6th power function and describes emphatically its application to switch-back curves.
理论和实践证明，六次代数式缓和曲线是一种质量较高的缓和曲线，它适用于作小半径圆曲线的过渡曲线。
The transition curve of 6th power function is a higher quality of transition curve in theory and practice. It is also suitable for use to a small radius circle curve as a transition curve.
数学方程，从简单的代数式到富有挑战性的困难的微分方程，这些简洁的模式都允许我们把一个巨大的物理现象纳入其中。
Mathematical equations, from simple algebraic ones to the more challenging differential equations, have allowed us to summarize an enormous amount of physical phenomena into a simple format.
数学方程，从简单的代数式到富有挑战性的困难的微分方程，这些简洁的模式都允许我们把一个巨大的物理现象纳入其中。
Mathematical equations, from simple algebraic ones to the more challenging differential equations, have allowed us to summarize an enormous amount of physical phenomena into a simple format.
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