| 释义 |
〔quadrant〕A machine part or other mechanical device that is shaped like a quarter circle.扇形体:形状似四分之一圆圈的机器零件或其他机械设备〔Octans〕Latin [half quadrant] 拉丁语 [扇形体的一半] 〔quadrant〕The plane area bounded by such an arc and two perpendicular radii.四分之一圆,扇形体:由九十度弧与两条垂直的半径围成的平面图形 |