Consider a set of observations (also called features, attributes, variables or measurements) for each sample of an object or event with known class y.
设观测向量x(也被称作特征、属性、变量、测量值等)对于对象或事件的每一个采样的所属类y都是已知的。
According to the requirements of the model, listener class and it's object will be created to register to the event source and realize the specific method in interface.
根据模型要求，要创建监听器类及其对象，完成向事件源的注册并实现接口中的特定方法。
An event is a member that enables an object or class to provide notifications. Clients can attach executable code for events by supplying event handlers.
事件是一种类成员，它使得对象或类能够提供通知。客户端被通知的对象。
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