sum

The wealthy businessman donated a large sum of money to the local children's hospital.

(Chinese) 那位富有的商人向当地儿童医院捐赠了一大笔钱。

They agreed to pay the total sum in three monthly installments.

(Chinese) 他们同意分三个月支付总金额。

The sum of three and seven is ten, as any primary school student knows.

(Chinese) 任何小学生都知道三加七的总和是十。

To find the average, you must first calculate the sum of all the numbers in the list.

(Chinese) 要计算平均值，你必须先计算出列表中所有数字的总和。