Defines a method in the class called Echo that accepts a string as a parameter and returns a string as a result (functions and subs in classes are referred to as methods).

在类中定义方法echo，该方法接受字符串作为参数并返回字符串作为结果(类中的函数和sub被称为方法)。

youdao

The Nobel committee called George Babbitt the popular hero of the American middle class.

VOA: special.2009.03.13

These are of the class called IgG, they're Y shaped molecules.

这种被称为IgG抗体,它们是Y形分子

耶鲁公开课 - 生物医学工程探索课程节选

And I took a class when I was a freshman, called the First Year Seminar,

我大一的时候还上过一门课叫新生研讨会，

选择国际学的理由 - SpeakingMax英语口语达人

AstraZeneca's boast was based on the results of a clinical trial called STELLAR, which compared Crestor against other medicines in the class of cholesterol drugs called statins.

FORBES: FDA Warns AstraZeneca On Crestor Marketing

These supporters believe that entitlements are fine as long as the rich pay for them, but what happens when the poor and middle class are called to the table to pay?

FORBES: The Liberal Left's Dirty Little Secret: The Middle Class and Poor Pay For the Entitlement State

During the next class, the homeroom teacher called the Korean student who had touched the trumpet without permission to come to the blackboard and meted out the punishment of holding two water-filled buckets with outstretched arms.

NPR: 'A Tale of Music': From 'Literature from the Axis of Evil'