be in circulation
The new banknotes have been in circulation since last month.
新钞票自上个月起已开始流通。
血液循环；循环系统
传播；流传；发行；发行量；销售量；流通货币；通货；借阅量；（图书馆的）外借量
the movement of blood through the heart and blood vessels; also, the circulatory system
在圆圈中移动的行为,或在一个使移动体回到起点的路线中移动。
The act of moving in a circle, or in a course which brings the moving body to the place where its motion began.
期刊(如报纸或杂志)的发行
the dissemination of copies of periodicals (as newspapers or magazines)
从一个地方或人传递到另一个地方或人；自由传播；传递。
The act of passing from place to place or person to person; free diffusion; transmission.
循环运动；尤其是血液通过心脏和血管的运动
movement through a circuit; especially the movement of blood through the heart and blood vessels
货币；流通的硬币；纸币、钞票等,作为硬币流通。
Currency; circulating coins; notes, bills, etc., current for coin.
(图书馆学)在特定时期内图书馆借出的书籍数量
(library science) the count of books that are loaned by a library over a specified period
任何事物流通或被流通的程度；扩散的测量,尤其是出版物的销售数量。
The extent to which anything circulates or is circulated; the measurement of diffusion, especially the number of copies sold of a publication.
血液在循环系统中的流动,使其与身体的细胞和组织紧密接触；(广义上)循环系统。
The movement of the blood in the circulatory system, by which it is brought into close relations with the cells and tissues of the body; (loosely) the circulatory system.
植物体内汁液在导管和组织中的流动
The movement of the sap in the vessels and tissues of plants.
Regular exercise helps improve blood circulation in your legs.
经常锻炼有助于改善腿部的血液循环。
用法提示：circulation 是名词，指血液在体内循环流动。
The doctor pressed his fingers to her wrist to check the circulation.
医生用手指按住她的手腕检查血液循环。
用法提示：circulation 作名词，表示血液通过血管的循环。
Cold weather can slow the circulation in your hands and feet.
寒冷的天气会减慢手脚的血液循环。
用法提示：circulation 在这里是名词，指血液在身体各部位的流动。
The new banknotes have been in circulation since last month.
新钞票自上个月起已开始流通。
Some old coins are out of circulation and worth a lot.
一些旧硬币已退出流通，价值很高。
The circulation of fresh air is important in a crowded room.
在拥挤的房间内，新鲜空气的流通很重要。
The magazine introduced new features to boost its circulation.
该杂志推出新栏目以增加发行量。
distribution侧重指发行或分发的动作，而circulation强调实际传输的份数，两者在出版物语境中可替换，但distribution更强调过程。
dissemination通常指信息或知识的传播，用于出版物时强调散布范围，与circulation通用但较正式。
grammar · medium
易错句子The money needs to circulation in the economy.
正确表达The money needs to circulate in the economy.
circulation是名词，不能作谓语动词；应用动词circulate表示流通。
grammar · medium
易错句子There are many circulations of this magazine every month.
正确表达This magazine has a large circulation every month.
circulation表示发行量时通常不可数，不用复数形式。
针对流通或循环的意义，表示流动或传播的停止
distribution强调分配的过程或方式，而circulation特指出版物或货币的流通量。
circular指具体的印刷宣传品，而circulation指发行量或流通状态。
血液循环
Regular exercise improves blood circulation.
定期锻炼改善血液循环。
日发行量
The newspaper has a daily circulation of 100,000.
这家报纸的日发行量为10万份。
大量发行
The magazine achieved mass circulation within a year.
该杂志在一年内实现了大量发行。
空气循环
The fan improves air circulation in the room.
风扇改善了房间的空气循环。
货币流通
The central bank controls money circulation.
中央银行控制货币流通。
ation
ation
ation
ation
ation
circ- (circle) + -ation (noun suffix)
circ- (circle) + -le (diminutive suffix)
circ- (circle) + -uit (from Latin ire 'to go')
circ- (circle) + -ulate (verb suffix)
在流通中；在流传中
The new coins will be put into circulation next month.
新硬币将于下月投入流通。
不再流通；不再活跃
After the scandal, the politician was out of circulation for years.
丑闻之后，那位政客多年不再活跃。
使某物流通；发行
The bank put the new banknotes into circulation last week.
银行上周发行了新钞票。
Dictionary facts from ECDICT, OCTANOVE, WIKTIONARY.