This paper gives the conversion formula from the first type surface integral to the first type curvilineal, and sets a example of using the method to solve exercises.

本文建立了一种特殊的第一型曲面积分与第一型曲线积分的转化公式，并通过实例表明该方法在解决问题时所带来的方便。

Set up a curvilineal equation of acid-base titration, and every pHysics meanings in the equation and factors of the effect its titrate suddenly jump range were discussed.

建立了酸碱滴定的滴定曲线方程，并讨论了方程中各项的物理意义及影响滴定突跃范围的因素。