做到这一点的唯一方法，是把获得免费校餐的孩子的考试成绩单独列出：只有穷人才能获得免费食物。
The only way to do that is to separate out the exam results of children who get free school meals: only the poor get free grub.
过去，单独定义目录的唯一借口是您的mkdir实现不支持此选项，但是在大多数系统上不再是这样了。
In the past, the only excuse to define directories individually was that your mkdir implementation did not support this option, but this is no longer true on most systems.
您还可以重用我前面给出的一个命令来截取在此时间期限中得到处理的所有唯一ID，并为每个线程生成单独的线程日志。
You can also reuse a command I gave you earlier to strip all the unique IDs that were being processed during this timeframe and generate separate thread logs for each.
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