bridge模式使你可以对不同的抽象接口和实现部分进行组合，并对他们进行扩充。对一个抽象的实现部分的修改应该对客户不产生影响，即客户的代码不需要重新编译-The bridge mode allows you to combine different abstract interface and implementation part, and expansion. An abstract part of the changes should the customer does not impac