... siaying close to and looking at somebody » siaying密切,并期待着在有人 consider a distance education » 考虑一个远程教育 It indicates a kind of emotional » 它表明一种情绪上 ..
So the typeofmulticastapplicationhasbecomeaimportantfactor. For example, the securityquestion of multicast member's expandingshould bethoughtindistanceeducation;