quadrilateral; tetragonum; quadrangle四边形四边形的: quadrilateral安全四边形: complete quadrilateral不等四边形: trapeziform; trapezium垂心四边形: orthocentric quadrangle大地四边形: geodetic quadrangle; geodetic quadrilateral下载手机词典可随时随地查词查翻译关注微信公众号:chachacidian,回复:四边形,即可在微信中查询翻译