资料来源 : pyDict

买空卖空;低估,轻视

资料来源 : WordNet®

sell short
     v 1: sell securities or commodities or foreign currency that is
          not actually owned by the seller, who hopes to cover
          (buy back) the sold items at a lower price and thus to
          earn a profit
     2: underestimate the real value or ability of; "Don't sell your
        students short--they are just shy and don't show off their
        knowledge"