Rather than entering a patterncode as in previous versions, users can opt to look into their camera.
用户可以选择查看他们的相机，而不是像以前的版本一样键入模式代码。
2
Metaprogramming offers a great way to differentiate patterncode from implementation code because you express your pattern by using code that is about code.
元程序设计提供一种不错的方式将模式代码与实现代码区分开来，因为您使用关于代码的代码来表达您的模式。
3
This is a class that can be used repeatedly to instantiate a class as a singleton without having to re-write the singleton patterncode for that specific class.