circular curve的用法和样例：
例句
- 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.
摘要等距型面轮廓曲线为非圆曲线的一种，对其参数的测量和误差的计算比较困难，目前尚没有统一的评价标准。 - There are many methods to measure the circular curved line in circuitry construction survey.Angle offset method and tangent offset method are usually used.
摘要在线路施工测量中，圆曲线测设方法有很多，通常采用偏角法或切线支距法。
