archosn.肛archn.拱；拱门；拱状物v.成拱形；拱起adj.主要的；调皮的Archimedean absolute value阿基米德绝对值Archangiopteris hokouensisn.河口原始观音座莲Arch bridge without thrust无推力式钢桁系杆拱桥Archangiopteris subrotundan.圆基原始观音座莲arch ecological protection小拱架生态防护archimedes right helicoids阿基米德正螺旋面archimedian spiral antenna阿几米德螺线天线Archimedian screw conveyer[机] 阿基米得螺旋运输机arch dam foundation system拱坝-地基系统archaeological stratigraphy考古地层学