You must design a recursive procedure to test for at least one condition that can terminate the recursion , and you must also handle the case where no such condition is satisfied within a reasonable number of recursive calls 您在设计一个递归过程时，必须至少测试一个可以终止此递归的条件，并且还必须对在合理的递归调用次数内未满足此类条件的情况进行处理。
In chapter 2 , many kinds of adaptive filter algorithms are discussed . this section analyzes the least mean squares ( lms ) , normalized lms ( nlms ) and recursive least squares ( rls ) algorithms , and evaluates their performance as acoustic echo canceller 分析了最小均方误差( lms )算法、归一化的最小均方误差( nlms )算法和递归的最小二乘( rls )算法，并且结合声回波抵消算法评估了它们的性能。
Deadlock prevention and surprise dismount handling during this process require heroic efforts , including a mechanism whereby a file system driver can stash a pointer to an automatic variable ( that is , one allocated on the call / return stack ) to be used in deeper layers of recursion within the same thread 在这个过程请求宏大结果的时候， （进行）死锁预防和意外卸下处理，包括一个机制，凭借这个机制文件系统驱动可以中断在相同线程中用于深层递归的自动变量的指示器（就是说，在调用/返回堆栈上分配一个） 。
