It can reduce data redundance and improve data access efficiency.
该模型能有效降低数据冗余，提高数据访问效率。
All above must come to being data redundance, data exchange difficulty and work inefficiency.
这必然造成信息冗余，信息交换受阻，从而直接导致工作效率的降低。
The thesis introduces a structure of database system based on time, which reduces the data redundance.
提出了一种基于时态的数据库系统的基本结构，减少数据冗余。
For the distributed database systems, query processing becomes more difficult because of distribution and redundance of data.
在分布式数据库系统中，由于数据的分布和冗余，查询处理变得更为复杂。
There are some redundance data in their signature;
签名中存在冗余的数据；
There are some redundance data in their signature;
签名中存在冗余的数据；
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