This is the highest priority runnable task on the system and is the task the scheduler will run.
这就是系统中优先级最高的可执行进程，也是马上会被调度执行的进程。
Therefore, each runnable task chases the other to maintain a balance of execution across the set of runnable tasks.
因此，每个可运行的任务都会追赶其他任务以维持整个可运行任务集合的执行平衡。
The Runnable task performed by the service is the bulk of the code from Listing 5. I've added some additional checks to improve building the URLs for the next page.
该服务执行的Runnable任务是清单5中的大量代码。我添加了一些额外的检查，以改进构建下一个页面的URL的过程。
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