我们建立有两个变量φ和θ的球面的参数方程,它们恰好是,球坐标系统的一部分。

We are finding a parametric equation for the sphere using two variables phi and theta which happen to be part of the spherical coordinate system.

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对微型机器人运动学和动力学方程进行了求解，通过坐标图分析了微型机器人的形状参数和游动参数对微型机器人游动推进速度和游动推进力的影响。

According to solving the equations and using coordinate graphs, the influences of shape and swimming parameters on the swimming speed and propulsion are studied and analyzed.

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本文讨论了参数方程和极坐标方程表示的曲线的对称性，给出了判定这两种曲线的对称性的充分条件。

In this paper, the symmetry of curved lined given by parametric equation and polar coordinates equation is discussed and the sufficient conditions are given.

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