[] the passing or spreading of sth from one person or place to another 流传；传播◆the circulation of information/ideas 信息的传播；观念的流行
[] the use of coins and notes as money （货币的）流通◆There is a large amount of forged money in circulation. 有大量的假币在流通。◆The notes were taken out of circulation. 这纸币已停止流通。
[, ]the usual number of copies of a newspaper or magazine that are sold each day, week, etc. （报刊）发行量，销售量◆a daily circulation of more than one million 每日发行量超过一百万份