n.流通，传播；血液循环；发行量；（某段时间的）社交活动 变形： 复数：circulations 双语释义：n.(名词)[U][C]流通,循环 the flow of gas or liquid around a closed system[U]流通,传播 the movement of sth, such as news or money, from place or from person to person[S]发行量 the average number of copies of a newspa