拱 拱的英文 英语翻译 arch; hump up; surroundarcade arch; arch 拓展翻译 弓形拱segmental arch拱抱surround拱背角angle of skew back拱壁buttress拱床炉wedge furnace拱道archway拱点apse拱顶vaultapex of arch; crown of arch拱腹soffit拱杆arch bar拱杆转向架arch bar truck拱管arch tube拱管塞arch tube plug拱肩spandrel拱廊arcade拱门arch; arched door; archway拱桥arch bridgearch bridge拱曲arched拱券arch拱石voussoir