Similarly, the LineItem class has a many-to-one relationship to the product object as well.

类似地，LineItem类与产品对象也具有多对一关系。

youdao

Listing 1 shows the source code for the Product object.

清单1显示了Product对象的源代码。

youdao

Listing 1 shows the source code for the Product object.

清单1显示了Product对象的源代码。

youdao