名词

1. (报纸、杂志的)发行量，销售量
The circulation of a newspaper or magazine is the number of copies that are sold each time it is produced.

2. 血液循环
Your circulation is the movement of blood through your body.

3. see also: circulate

4. (货币等)流通/不流通/退出流通
If something such as money is in circulation, it is being used by the public. If something is out of circulation or has been withdrawn from circulation, it is no longer available for use by the public.

5. (一段时间)不出现在公共场合，不参加社交活动;坐牢;服刑
If someone is out of circulation, they do not appear in public or at social gatherings for a period of time. You can also say that someone is out of circulation when they are in prison.

1. the spread or transmission of something (as news or money) to a wider group or area

2. the dissemination of copies of periodicals (as newspapers or magazines)

3. free movement or passage (as of cytoplasm within a cell or sap through a plant)

e.g. ocean circulation is an important part of global climate
a fan aids air circulation

4. movement through a circuit
especially the movement of blood through the heart and blood vessels

5. number of copies of a newspaper or magazine that are sold

e.g. by increasing its circulation the newspaper hoped to increase its advertising

6. (library science) the count of books that are loaned by a library over a specified period