Referencing the mature and efficient relational database query techniques, and to take the strategy space for time.
借鉴关系数据库成熟高效的查询技术，并采取以空间换时间的策略。
My ego tells me that as a capable NASA executive I am confident of the future direction and strategy of the nation's space program.
我的自我意识告诉我，作为一个称职的美国航空航天局执行官，我对国家太空计划的未来方向和战略充满信心。
Notice how very little effort was required to update the model following this strategy, although the obvious problem of wasted space in the database has increased.
尽管很明显，数据库中的空间浪费增加了，但请注意，按照这种策略操作，只需花非常小的代价就可以更新模型。
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