polar coordinate system的用法和樣例：
例句
- Motion is specified by translations, rotations, and nonuniform scalings of the local coordinate system of each moving object.
運動(dòng)通過(guò)平移，旋轉，以及每一個(gè)移動(dòng)對象的局部坐標系統的非一致縮放來(lái)實(shí)現。 - Suppose you want to work with a coordinate system that has its origin in the body of the client area rather than the upper-left corner.
假定您想使用原點(diǎn)位于工作區的主體而非左上角的坐標系統。
