把...分成扇形；[计] 扇面; 扇区; 段; 区段
扇形；部门；把...分成扇形；[计] 扇面; 扇区; 段; 区段
n. a plane figure bounded by two radii and the included arc of a circle；n. a social group that forms part of the society or the economy；n. a particular aspect of life or activity；n. the minimum track length that can be assigned to store information; unless otherwise specified a sector of data consists of 512 bytes
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