1
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
circulations — plural of circulation
先理解核心含义，再看它在真实句子里的用法。
血液循环；循环系统
the movement of blood through the heart and blood vessels; also, the circulatory system
The new banknotes have been in circulation since last month.
新钞票自上个月起已开始流通。
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
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。
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。
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。
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。
Not this
The money needs to circulation in the economy.
Use this
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。
Not this
There are many circulations of this magazine every month.
Use this
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。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
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。
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。
Use circulations naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
联想"circle（圆）"和"流动"，circulation就是循环或流通。
中性或正式；多用于新闻出版行业，指报刊杂志的发行数量。
These words rhyme with 'circulation' as they all end with the /eɪʃən/ sound. Note that 'circulate' (/ˈsɜrkjʊleɪt/) is a common lookalike with a different ending (/leɪt/ vs /leɪʃən/).
Dictionary facts from ECDICT, OCTANOVE, WIKTIONARY.