v.合计( sum的过去式和过去分词 )；总结，归纳；总计，计算…的总数（常与 up 连用）；集中（常与 up 连用） 英英释义： sum[ sʌmd ]n.a quantity of money"he borrowed a large sum"同义词：sum of moneyamountamount of moneya quantity obtained by the addition of a group of numbers同义词：amounttotalthe final aggregate"the