清单 3 中的示例显示可以如何将此操作符与 ! $ 运算符组合使用。

The example in Listing 3 shows how you can use this operator in combination with the !$ operator.

youdao

操作可以是一个关系运算符，或者系统或用户定义的函数，也可以是一个sql操作符，例如GROUP BY、ORDER BY等。

An operation can be a relational operator, a system - or user-defined function, or an SQL operator, such as GROUP BY, ORDER BY, and so on.

youdao

尽管和[]在运算期间使用相同的测试操作符，但是它们使用不同的逻辑操作符。

Although and [] use the same test operators during evaluation, they use different logical operators.

youdao

And in Python the expression is, operand, operator, operand, when we're doing simple expressions like this, and if I give it to the interpreter, it gives me back exactly what you'd expect, which is that value. OK?

在Python中表达式就是，运算对象，操作符，运算对象，当我们处理这样的简单表达式的时候，我把表达式传给处理器，处理器给我返回了我想要的结果，对不对？

麻省理工公开课 - 计算机科学及编程导论课程节选