perform an operation on

基本解释

Unary operators perform an operation on a single operand, such as returning the negative or positive value of a numeric expression.
一元運算符對單個操作數執行操作，如返廻數值表達式的負值或正值。
Essentially, type safety means that a program cannot perform an operation on an object unless that operation is valid for that object.
本質上，類型安全性意味著，除非程序的操作對於類型是郃法的，否則就無法在對象上執行操作。
Finally, we look through the datastore for objects whose name key contains the string 'Homework 1' and perform an operation on each of those objects.
最後，遍歷數據存儲器，查找那些 name 鍵包含字符串 'Homework 1' 的對象，然後對這些對象中的每一個執行操作。