cur·ren·cy /ˈkɝən(t)si, ˈkʌrən(t)-/
  貨幣,貨幣型通貨,流通,通用
  currency
  指標
  currency
  貨幣 流通
  Cur·ren·cy n.; pl. Currencies
  1. A continued or uninterrupted course or flow like that of a stream; as, the currency of time. [Obs.]
  2. The state or quality of being current; general acceptance or reception; a passing from person to person, or from hand to hand; circulation; as, a report has had a long or general currency; the currency of bank notes.
  3. That which is in circulation, or is given and taken as having or representing value; as, the currency of a country; a specie currency; esp., government or bank notes circulating as a substitute for metallic money.
  4. Fluency; readiness of utterance. [Obs.]
  5. Current value; general estimation; the rate at which anything is generally valued.
     He . . . takes greatness of kingdoms according to their bulk and currency, and not after intrinsic value.   --Bacon.
     The bare name of Englishman . . . too often gave a transient currency to the worthless and ungrateful.   --W. Irving.
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  currency
       n 1: the metal or paper medium of exchange that is presently used
       2: general acceptance or use; "the currency of ideas"
       3: a current state of general acceptance and use [syn: vogue]
       4: the property of belonging to the present time; "the currency
          of a slang term" [syn: currentness, up-to-dateness]