The scheduling classes are like a chain of modules assisting the core scheduler.

该调度类类似于一个模块链，协助内核调度程序工作。

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The core scheduler USES this method to load-balance processes managed by the scheduling module.

内核调度程序使用这种方法实现由调度模块管理的进程的负载平衡。

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Task_new: the core scheduler gives the scheduling module an opportunity to manage new task startup.

task_new：内核调度程序为调度模块提供了管理新任务启动的机会。

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