op·er·and /ˌɑpəˈrænd/
  運算對象,操作數
  operand
  運算元; 運算元的; 運算數; 操作數; 運算對象	OP; OPND
  operand
  運算元
  Op·er·and n.  Math. The symbol, quantity, or thing upon which a mathematical operation is performed; -- called also faciend.
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  operand
       n : a quantity upon which a mathematical operation is performed