circulationKK [ˋsɝkjəˏleʃən] /ˈsɝkjəˌleɪʃən/名詞1血液循環、循環Regular walking can improve circulation in your legs.規律散步可以改善腿部的血液循環。2發行量、銷量The magazine has a circulation of about two hundred thousand.這家雜誌的發行量大約二十萬份。3流通、流傳The old banknotes are no longer in circulation.那些舊鈔票已經不再流通。4流通、對流Open a window to allow better air circulation in the room.把窗戶打開,讓房間裡的空氣流通一些。5借閱量、流通量圖書館用語The library reported a sharp drop in circulation last year.圖書館表示去年的借閱量大幅下降。