perpendicular at midpointperpendicular bisector垂直: perpendicular; vertical; squ ...等分: divide from the middle; halv ...线: thread; string; wire等分线: bisector; bisectrix; halving line; mean line; square (or vertical) station; station (or ordinate)平分线；等分线；二等分物: bisector下载手机词典可随时随地查词查翻译
