sector
/ˈsektə(r)/noun
1
- an area or portion that is distinct from others区域; 部分。
1.1
- a distinct part or branch of a nation's economy or society or of a sphere of activity such as education（国家经济、社会等活动的）部门。
1.2
- Military a subdivision of an area for military operations【军】（军事行动的）地段, 分区, 防区。
1.3
- Computing a subdivision of a track on a magnetic disk【计算机】（磁盘上的）扇区。
2
- the plane figure enclosed by two radii of a circle or ellipse and the arc between them扇形。
3
- a mathematical instrument consisting of two arms hinged at one end and marked with sines, tangents, etc. for making diagrams函数尺, 象限仪。
派生词
sectoral
adjective词源
late 16th cent. (in senses 2 and 3)： from late Latin, a technical use of Latin sector 'cutter', from sect- 'cut off', from the verb secare.