在这个简单的例子中，客户类的delete方法包含检查该客户的一个或多个订单是否依然存在的适当代码。

In this simple example, the delete method of the customer class contains appropriate code to check if one or more orders for this customer still exist.

youdao

在这个简单的例子中，客户类的delete方法包含检查该客户的一个或多个订单是否依然存在的适当代码。

In this simple example, the delete method of the customer class contains appropriate code to check if one or more orders for this customer still exist.

youdao