1 [U] the movement of blood around the body 血液循环: If you have bad circulation, your hands and feet get cold easily. 血液循环不良，手脚容易发冷。

2 [U] the passing of sth from one person or place to another 流传: the circulation of news/information/rumours 消息╱信息╱谣言的传播Old five pence coins are no longer in circulation (= being used by people). 旧的五便士硬币不再流通。

3 [C] the number of copies of a newspaper, magazine, etc that are sold each time it is produced （报纸、杂志等的）发行量: This newspaper has a circulation of over a million. 这份报纸的发行量超过100万份。