The reason: Normalization requires more tables, table joins, keys and indexes and thus more internal database operations for implement queries.
其原因是：规范化需要更多的表，连接等操作，主键、索引，从而需要更多的内部操作。
On the one hand, there is the internal organization of a's data — its normalization and denormalized optimizations, for example.
一方面，是A数据的内部组织——例如，其标准化和取消标准化优化。
On the one hand, there is the internal organization of a's data — its normalization and denormalized optimizations, for example.
一方面，是A数据的内部组织——例如，其标准化和取消标准化优化。
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