isometric circle的用法和樣例：
例句
- The locus of points equidistant from a given point is a circle.
與一個(gè)定點(diǎn)等距的點(diǎn)的軌跡是一個(gè)圓。 - The outlining curve of an isometric polygon is one of the un-rounded curves, it is difficult to measure its parameters and calculate the errors.
摘要等距型面輪廓曲線(xiàn)為非圓曲線(xiàn)的一種，對其參數的測量和誤差的計算比較困難，目前尚沒(méi)有統一的評價(jià)標準。
