private constructors meaning in English

局部构造函数

Private constructors for each manager singleton
用于每一个单独管理员的私有构建程序。
A private constructor prevents the class from being instantiated
私有构造函数阻止类被实例化。
A private constructor is a special instance constructor
私有构造函数是一种特殊的实例构造函数。
The following is an example of a class using a private constructor
下面是使用私有构造函数的类的示例。
Do classes that should not be instantiated have a private constructor
不需要实例化的类有私有构造函数吗

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