详细解释:n. 流通, 循环, 发行量
【化】 环流
【经】 (货币,消息等的)流通, 传播
相关词组:
in circulation
英语解释：
名词 circulation:
the dissemination of copies of periodicals (as newspapers or magazines)movement through a circuit; especially the movement of blood through the heart and blood vessels(library science) the count of books that are loaned by a library over a specified periodnumber of copies of a newspaper or magazine that are soldfree movement or passage through a series of vessels (as of water through pipes or sap through a plant)the spread or transmission of something (as news or money) to a wider group or area例句：
The newspaper's circulation has trebled since last year.去年以来该报的发行量已增加到原来的三倍。