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In system development, some objects cannot be accessed directly due to network or other obstacles. At this time, a proxy object can be used to access the target object. Such as calling Web services in. NET.胡兄听了别生气，也别说不可能。Jim Reynolds开发兼执笔﹑James Burrows执导的《东邻西舍 The Neighborhood》讲述一个原本住在中西部的大好人Dave Johnson（Max Greenfield 饰，代替试映集中的Josh Lawson）举家搬到洛杉矶黑人社区后 ，这儿的人并非都欣赏他的睦邻风格，其中包括主角新邻居Calvin Butler（Cedric the Entertainer饰）。其他主演有Sheaun McKinney﹑Tichina Arnold﹑Beth Behrs﹑Marcel Spears及Hank Greenspan。老板娘一直认为陈启的女友一定是那种又胖又丑又老的女生，因为按照她的逻辑，稍微漂亮一点的女生是不会看上一个洗碗工的。Code as above; Write three functions of order500, order200 and orderNormal respectively, and process their own business logic in the functions respectively. If their own functions cannot be processed, they will return the string nextSuccessor to pass it back, then encapsulate the constructor Chain, pass an object fn into it, and have their own attribute Successor. There are two methods setNextSuccessor and passRequest on the prototype. The method setNextSuccessor specifies the order of nodes in the responsibility chain, and saves the corresponding method to the attribute this.Successor, chainOrder500. SetNextSuccessor (chainOrder200); ChainOrder200. SetNextSuccessor (chainOrderNormal); Specifies the order in the chain, so this.Successor references the order200 method and the orderNormal method, so if chainOrder500.passRequest (1, true, 500) is called for the first time, the order500 method is called, output directly, and chainOrder500.passRequ is called for the second time.Model Stealing Technology: Used to detect "stealing" (i.e. Copying) models or restore the identity of training data through black boxes. For example, this can be used to steal stock market prediction models and spam filtering models so as to use them or to optimize them more effectively.