So what is all that management overhead buying?
那么这些管理开销都买了什么呢?
The problem: accessing the next element in the lazy sequence has some management overhead.
但是有一个问题:在lazy sequence中访问下一个元素可能会有一些数据管理上的开销。
To reduce management overhead, we need to delete unused and irrelevant files from time to time.
为了降低管理负担,我们需要不时地删除无用和不相关的文件。
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