drop英[drɒp]美[drɑp]vt.& vi.（使）落下;投下;（使）降低;減少vt.放棄;停止;（故意）降下;垂下（眼睛）n.滴;空投;降落;少量[例句]Back in november , the market was predicting that volatility would drop during the next six months.回到去年11月，當時市場預計未來六個月波動性將降低。
