second-hand
  (adj.)二手的
  secondhand
       adj 1: derived from what is primary or original; not firsthand; "a
              secondhand report"; "a secondhand account of a memory
              of something once read"; "most of our knowledge is
              secondhand"
       2: previously used or owned by another; "bought a secondhand
          (or used) car" [syn: used]
       adv : by indirect means; "I heard about it only secondhand or
             thirdhand"; "he prefers to buy secondhand"