英语作文100词 社交媒体利与弊:A social network is a social structure made up of individuals called "nodes", which are tied by one or more specific types of interdependency, such as friendship, kinship, comm
1 low price, low cost; 2 without printing, saving paper, ink, water resources; 3 no logistics, warehousing, without transport, saving manpower and material resources; 4 to speed up the publishing cycle, en