The implementation order doesn't really matter, both are useful in their own right, and complementary when used together.
实现顺序并不是真正的问题,两种方式都可以单独使用,而且结合使用时则是互补的。
These entries mean that the engine class will search for any algorithm implementation in the above mentioned order.
这些项意味着引擎类将按上面提到的顺序搜索任何算法实现。
The method's implementation creates instances of Order and CreditCard and sets their attributes.
该方法的实现创建了Order和CreditCard的实例,并且设置了它们的属性。
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