sector
noun
ˈsektə
noun
1
a
part
of
an
area
of
activity,
especially
of
business,
trade
etc
〔尤指商业、贸易等的〕部门; 行业
[+
of
]
the
agricultural
sector
of
the
economy
（国民）经济中的农业部门
public/private
sector
2
one
of
the
parts
into
which
an
area
is
divided,
especially
for
military
purposes
〔尤指为军事目的设立的〕地区，区域