To add new methods to a particular class of type t, it only needs to define static methods that accept type t as the first parameter.

要向类型为t的特定类添加新方法，只需定义一个静态方法，它接受类型T作为第一个参数。

youdao

I announced on the first day of class that I don't, myself, believe in the existence of a soul.

第一节课上,我就声明,本人并不相信灵魂的存在

耶鲁公开课 - 死亡课程节选

But for me personally, it doesn't have to be first class.

但是对我个人而言，不一定需要最上乘的。

喜欢巧克力吗？ - SpeakingMax英语口语达人

But I want to end this first real class with a bit of humility as to what psychologists know and don't know.

最后,作为第一堂教学课的结束,我还是想对心理学家们知道什么,不知道什么,保持一种谦虚的态度

耶鲁公开课 - 心理学导论课程节选

"We're not saying if you don't fly first class you can't fly, " he says.

FORBES: Magazine Article

They weren't first-class citizens but they weren't chased out of the country altogether either, as happened, say, to Jews in Spain or at some points England and Christian Europe.

NPR: Early Divisions at Root of Sunni-Shia Conflict

Similarly, what caused a minor hiatus about George Osborne's train trip back from his constituency was not the fact that he hadn't bought a first class ticket.

BBC: UK