archedadj.拱形(结构)的；有拱的动词arch的过去式和过去分词形式.archn.拱；拱门；拱状物v.成拱形；拱起adj.主要的；调皮的arch roof truss拱板屋架architrave jamb门窗边框线脚archimedes pump螺杆泵archaemagnetismn.地磁定年术Archips fumosusn.紫杉黄卷蛾Archean nucleus太古代陆核arched rail set钢轨拱形支架arch type dryer拱形干燥器arch ring slabs拱圈底板arch foundation拱形基础