generating circletracing circle母: mother圆: round; circular; spherical母圆, 昼圆, 滚动圆: rolling circle超环面的母圆: generant of the toroid咽喉半径(蜗轮副咽喉的超环曲面的母圆半径): gorge radius下载手机词典可随时随地查词查翻译关注微信公众号:chachacidian,回复:母圆,即可在微信中查询翻译