| 单词 | 周线 |
| 例句 | DEFINITIVE EXAMPLES 权威例句〔ambit〕An external boundary; a circuit.界线；周线美国传统〔circuit〕A closed, usually circular line that goes around an object or area.环形线，周线：通常为围绕一个物体或区域的圆形封闭线美国传统〔planimeter〕An instrument that measures the area of a plane figure as a mechanically coupled pointer traverses the perimeter of the figure.测面仪：一种仪器，当机械连结的探针扫过平面图形的周线时能测出图形的面积美国传统〔shape〕The contour of a person's body; the figure.身材：一个人的身体周线；身材美国传统 |
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