It is my true belief that Singleton patterns have been used with far too little thought in most frameworks.
我坚信，在大多数的框架中，使用单例模式时，考虑得都太少了。
The framework we'll create is a simple 3-tier framework that processes business logic using three patterns: the 3-layer architecture pattern, the Singleton pattern, and the Command pattern.
我们将要建立的是一个简单的3-tier框架，它使用了三种模式处理业务逻辑：3-layer体系结构模式、Singleton模式和Command模式。
Then it shows how PHP V5.3's LSB feature resolves those issues, while showing implementations of the singleton and active record design patterns.
然后展示了PHPV5.3的LSB特性，并给出了单例和活动记录设计模式。
The singleton, builder, and factory method design patterns are considered creational patterns, as they assist in the construction of objects.
单例、生成器和工厂方法设计模式被视为是创建型的模式，因它们可协助对象的构建。
Whereas the singleton implementation uses the subclass's class name, other patterns (such as active record, covered later) need to reference other static properties.
尽管单例实现使用的是子类的类名，其他的模式（比如稍后介绍的活动记录模式）需要引用其他的静态属性。
The singleton pattern is probably one of the most often used OOP design patterns; it restricts the number of object instances of a class to one.
单例模式可能是最常用的OOP设计模式之一了；它限制了一个类的对象实例数只能为1。
Conclusion The twin pregnancy and singleton pregnancy have different growth patterns in the third trimester pregnancy.
结论双胎妊娠胎儿与单胎妊娠胎儿在晚孕期有着不同的生长发育规律。
Conclusion The twin pregnancy and singleton pregnancy have different growth patterns in the third trimester pregnancy.
结论双胎妊娠胎儿与单胎妊娠胎儿在晚孕期有着不同的生长发育规律。
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