This section provides a brief description of each option and a long-form catalog of benefits and the price you might have to pay.
这一节简要描述各种选择，列举了各种优点和需要付出的代价。
Whether creating your own patterns or using a pattern that already exists, make sure you pay close attention to the Applicability section.
不论您是创建自己的模式，还是使用已经存在的模式，务必要密切地关注“适用性”部分。
An early example of this model was online email, where you got a certain amount of storage for free and had to pay for more (see more about this, though, in the section on when free is dangerous).
这一模式早期的一个例子是在线的电子邮件，你可以免费获得一定的存储空间，当你想要更多空间时，则需要付费。
应用推荐