这两个类有着非常相似的对象模型。

These two classes have a very similar object model.

youdao

后两个类代表了业务域驱动示例类。

The latter two classes represent business domain-driven example classes.

youdao

现在要将这两个类链接起来。

Now you want to link these two classes.

youdao

And it seems pretty obvious that at least two of the things I'm going to want are stock and market.

很明显,我至少要有的两个类是,股票和市场。

麻省理工公开课 - 计算机科学及编程导论课程节选

I don't have to put an init in, but it's again, usually a good idea to put that in originally.

类定义内做些什么其他的东西呢？,好，在两个例子里，我都有init声明。

麻省理工公开课 - 计算机科学及编程导论课程节选