| 单词 | 正圆 |
| 例句 | DEFINITIVE EXAMPLES 权威例句〔conic section〕The intersection of a right circular cone and a plane, which generates one of a group of plane curves, including the circle, ellipse, hyperbola, and parabola.圆锥曲线：一正圆锥与一平面相切产生的一组平面曲线，包括圆、椭圆、抛物线和双曲线美国传统〔ellipticity〕Deviation from perfect circular or spherical form toward elliptic or ellipsoidal form.椭圆形，椭圆球：从正圆或球形向椭圆或椭圆球的偏离美国传统〔perfect〕He drew a perfect circle.他画了一个正圆。韦氏高阶〔posit〕He posited that each planet moved in a perfect circle.他认为每颗行星沿正圆轨道运行。朗文当代 |
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