Focus on the pronunciation of circulation
English definition of “circulation”
/ˌsɜr·kjəˈlei·ʃən/ n [C/U]
› biology the movement of blood inside the body › Circulation is also the movement of air or water in a space or system: [U] The fans in the air circulation system make a lot of noise. › A magazine or newspaper’s circulation is the number of people who read it: [C] The Chronicle has a daily circulation of 505,000. › If something is in circulation, it is available: [U] Are the new dollar coins in circulation yet? › If something is out of circulation, it is not available: [U] The company takes its movies out of circulation, then shows them again. [U] fig.infml She’s been out of circulation since her accident.