/sʌm/
名词
金额
I need to deposit a large sum of money into my savings account.
我需要把一大笔钱存入我的储蓄账户里。
(尤指运用加减乘除的简单)计算,算术
总数,总和
The sum of 13 and 8 is 21.
13加8等于21。
想跟读,去练习