该图说明了这一点，但还可以创建更大规模的构造，如函数定义和类。

The picture illustrates this, but you can also create larger scale constructs like function definitions and classes.

youdao

通常在类定义中包含不带参数的构造函数没有任何意义。

Often, it just doesn't make sense to include a zeroary constructor in a class definition.

youdao

不能通过代码为SDO编写一个类定义，也不能调用构造函数来创建它们。

You do not code a class definition for them, nor do you call a constructor to create them.

youdao