门户基础设施可能包含可选的反向代理，此代理被配置为代表原服务器接收请求。
The portal infrastructure might contain an optional reverse proxy, which is configured to receive requests on behalf of the origin server.
表现逻辑、业务逻辑和数据访问逻辑掺杂在一起导致脆弱的设计，这样很难在不破坏原 有设计的基础上做出变动。
The presentation logic, business logic and data access logic were all clubbed together thus leading to fragile design which is hard to change without breaking.
——文本出版：因为纸质图书和网络图书都是“只能阅读，不能拷贝”，所以读者无法轻易获得完整图书的电子文本，只能被动阅读，无法在原书基础上自由改动，变成“我的图书”。
File publishing: Both paper books and Internet books can only be read but not copied. Readers are not able to get the version and edit it freely, thus turn the book into one’s own.
应用推荐