基本解释等角拱词组短语短语equilateral circular arch 等边圆拱Gothic equilateral pointed arch 哥特式等边尖拱Equilateral pointed arch 等边尖拱gothic arch equilateral pointed arch 哥特式等边尖顶拱equilateral arch更多词组专业释义土木建筑工程等边拱