Theoretically speaking, it is a rather-clearly discussed subject to standardize the quadratic equation into the normal forms by spinning the coordinate axis so as to approach the shapes of its curves.

从理论上讲，通过坐标轴旋转将二次方程化简为规范形式，从而讨论其曲线的形状，这已是讨论得相当明了的课题。

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Coordinate with project management team and subcontractor, prepare and update regularly progress curves and report of planning.

协调项目管理团队和承包商，每日更新进度曲线并汇报计划。

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A new calculation is presented, in which the given functions or curves defined by dispersed coordinate points are approximated by quadratic curve in several parts.

本文提出将给定函数或离散坐标点定义的曲线，分段用二次曲线拟合的计算方法。

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