arbitrary quadrilateral的用法和样例：
例句
- In this paper, a free vibration study of arbitrary quadrilateral thick plates by the spline least spuare method was presented.
本文用样条最小二乘法求解任意四边形厚板的自由振动问题。 - According to the principles of infinitesimal calculus,a new method on how to ratiocinate the arbitrary quadrilaterals area was put forward.
利用微积分原理给出任意四边形面积公式推证的一种新方法。
