(noun.) measuring instrument consisting of two graduated arms hinged at one end.
(noun.) a particular aspect of life or activity; 'he was helpless in an important sector of his life'.
(noun.) a social group that forms part of the society or the economy; 'the public sector'.
(noun.) a portion of a military position.
(noun.) the minimum track length that can be assigned to store information; unless otherwise specified a sector of data consists of 512 bytes.
(noun.) a plane figure bounded by two radii and the included arc of a circle.
尤金伲亚整理
约瑟芬校对