One of the most frequent operations is to make the redundant information invisible.
最经常用到的一个操作就是使冗余信息不可见。
They contain enormous amounts of redundant data, and often present out-of-date information.
其中包含海量的冗余数据，并且通常提供过时的信息。
They contain enormous amounts of redundant data, and often present out-of-date information.
其中包含海量的冗余数据，并且通常提供过时的信息。
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