angle bisector分角线;角平分线
ngle bisector角平分线
bisector r平分
Aliquant bisector平分线
internal bisector内分角
the perpendicular bisector垂直平分线
angular r bisector角等分线
internal l bisector内分角
N（名词） a straight line or plane that bisects an angle 二等分线; 二等分平面 [maths]