sectorn.部门；部分；区域n.[计]扇形；扇区vt.使分成部分sector failure扇区故障sector shutter扇形快门sector pattern扇状模式sector of fire射击区域sector scaning扇形扫描sector analyst行业分析师sector element扇形股块sector strucre扇区结构sector mapping段映射sectorial form扇形