所以说球坐标系,其实就是在rz平面再建立一个极坐标。
So the idea of spherical coordinate is you're going to polar coordinates again in the rz plane.
球坐标中的平面也差不多是这样了，只要把rz看做极坐标就行了。
That's in line with the idea that we are just doing again, polar coordinates in the rz directions.
极坐标是关于r，θ的,用r，θ代替平面上一点的x，y坐标，是从原点到那一点的距离，，which，is，the，distance，from，the，origin，to，a，point，θ是由x轴逆时针旋转,而得到的夹角。
Remember that polar coordinates are about replacing x and y as coordinates for a point on a plane by instead r, r and theta,which is the angle measured counterclockwise from the positive x-axis.
了解之间的差异极坐标和直角平面。
Understand what the differences are between polar coordinates and the Cartesian plane.
受限势采用抛物形势，在二维平面极坐标下，用薛定谔方程的精确解析解进行计算。
In 2d polar coordinates, the exact solution to the Schrdinger equation was used to calculate the perturbation integral in a parabolic confinement potential.
提出用复数-极坐标矢量法(简称复矢量法)来分析平面机构的运动。
A new method is proposed to analyse the motion of plane mechanism by means of complex polar coordinates vector method.
提出用复数-极坐标矢量法(简称复矢量法)来分析平面机构的运动。
A new method is proposed to analyse the motion of plane mechanism by means of complex polar coordinates vector method.
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