add operation

• 加法运算

add operation的用法和样例：

例句

1. In an addition operation, a number or quantity added to the augend.
   在加法运算中，加到被加数上的数或量。
2. In shops you will have seen cash registers which basically can only add.
   你谅必在商店里见过现金收入记录机，它基本上只能做加法运算。