近义词辨析英语require request demand;

equire:[often passive](rather formal)to make sb.do or have sth,especially because it is necessary according to a law or set of rules or standard指要求做（某事）,达到（某水平）,尤指根据法律或规定
request（正式或礼貌的）要求,请求
demand :to ask for sth.very firmly；to say very firmly that sb.should have or do sth.指强烈要求,坚决要

需要请求需求;

第一组: edge 扁的固体、物体表面或一范围的外围界限（边缘） rim 圆形或近似圆形物体的边缘 margin 湖、水池、池塘等的边 brink 陡峭处、深渊的边缘，