The only drawback to this approach is the slight risk of getting stale data.
这种方法唯一的缺点是：有获得旧数据的轻微的风险。
However, this may not always be true, and stale data exceptions might occur.
但是，并非始终都是这种情况，并且可能会出现失效数据异常。
But the data on the disk is stale for a time, which is bad.
但是磁盘上的数据暂时会过时，这是坏的方面。
And the data already cleansed start getting stale.
已经清理过的数据又开始走样了。
And the data already cleansed start getting stale.
已经清理过的数据又开始走样了。
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