cir·cu·late

Circulation may refer to:

• Atmospheric circulation, the large-scale movement of air
• Circulation (physics), the path integral of the fluid velocity around a closed curve in a fluid flow field
• Circulatory system, a biological organ system whose primary function is to move substances to and from cells
• Circulation problem, a generalization of network flow problems
• Circulation (architecture), the flow of people through a building
• Circulation (currency), all currency held by consumers and businesses, but not by financial institutions and governments
• Exhaust gas recirculation, a nitrogen oxide reduction technique used in most gasoline and diesel engines
• Library circulation, the activities around the lending of library books and other material to users of a lending library
• Rhetorical circulation, the ways that texts and discourses move through time and space
• Newspaper circulation, the average number of copies of a newspaper distributed on a day
• Magazine circulation, the average number of copies of a periodical distributed per edition/ volume
• Circulation (journal), a journal published by the American Heart Association

六级/考研单词: physics, integrity, fluid, velocity, curve, consume, exhaust, nitrogen, oxide, gasoline, diesel, discourse, edit, journal