网上广告 离线广告的 onsite做广告
online advertising在线广告 offline advertising离线广告 onsite advertising现场广告
我觉得这三个依次应该是网络广告、媒体广告（主要指报纸、杂志上的广告）、最后应该是特定地点的广告（比如展览会，公司，酒店等等）
答：Online distance learning is an instructional system which learners with educatio...详情>>
答：I haven't window molding catalogs on hand. catalogs 产品目录 haven't ~ something ~ o...详情>>
问：working hard vs. hard working
答：there are no defferent.详情>>
