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1. Oxford Dictionary

   sector

   • IPA[ˈsɛktə]

   英式

   • n.
     an area or portion that is distinct from others；a distinct part or branch of a nation's economy or society or of a sphere of activity such as education

   • noun: sector, plural noun: sectors

2. • 釋義

   n.

   名詞

   • 1. an area or portion that is distinct from others operations in the southern sector of the North Sea 同義詞 district, quarter, part, section, zone, ... 更多precinct, borough, locality, neighbourhood, side, province, territory, division, region, area, belt, tract, locale, informalhood
   • ▪ a distinct part or branch of a nation's economy or society or of a sphere of activity such as education the government aimed to reassure the industrial and commercial sector 同義詞 part, branch, arm, division, subdivision, ... 更多area, department, category, field, sphere, layer, stratum, corner
   • ▪ a subdivision of an area for military operations.
   • ▪ a subdivision of a track on a magnetic disk.
   • 2. the plane figure enclosed by two radii of a circle or ellipse and the arc between them.
   • 3. a mathematical instrument consisting of two arms hinged at one end and marked with sines, tangents, etc. for making diagrams.