roundingn.舍入；凑整动词round的现在分词形式.roundadj.圆的；球形的；丰满的；完整的；整数的；不确切的；大量的；坦率的；严厉粗暴的adv.环绕地；周长；调转方向；依次；到某处prep.围绕；在另一侧；四处n.一局(轮)；常规活动；巡视；圆形物；(由一人给大家买的)一巡饮料；一整片面包；一阵(掌声)；一发(子弹)v.绕行；弄圆；使成为整数round thread linen抽花或刺绣用亚麻布round-head rivet[机] 圆头铆钉roundness thinking圆形思维rounding treatment舍入处理roundchiselforceps圆凿钱round-edged tyre圆边轮圈round robin series循环赛rounded sand grain[机] 圆形砂粒round-trip trade倒手买卖round-off symbol舍入符号

1. I am not capable to pay the sum.
   我付不起这笔款。
2. It is rational to give a sum of money to his favorite charity.
   给他喜欢的慈善机构留下一笔款是合理的。
3. His debts foot up to a huge sum.
   他欠的债加起来是一笔巨款。
4. He must have earned a large sum of money.
   他一定是挣了一笔巨款。