bisector的意思是等分线段的人或物。
1. midpoint bisector:中点分角线
2. angle bisector:角平分线
3. altitude bisector:高线分角线
4. bisector of a chord:一条弦的角平分线
5. bisector of a segment:一段线段的平分线
6. bisector of a ratio:比率的对等线
7. bisector of a section:截线的平分线
8. median bisector:中线分角线
9. mid-angle bisector:中角平分线