短语词组短语equilateral polygon 正多边形;等边多边形正多边形equilateral arch [建]等边拱;等角拱;对称双心拱equilateral E 等边形;等边的equilateral ĵ 等边形equilateral U 等边形equilateral projection 等距投影equilateral hexagon 正六边形equilateral triangle 等边三角形 返回 equilateral