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.
一元运算符对单个操作数执行操作，如返回数值表达式的负值或正值。
Essentially, type safety means that a program cannot perform an operation on an object unless that operation is valid for that object.
本质上，类型安全性意味着，除非程序的操作对于类型是合法的，否则就无法在对象上执行操作。
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.
最后，遍历数据存储器，查找那些 name 键包含字符串 'Homework 1' 的对象，然后对这些对象中的每一个执行操作。