以上来源于: WordNet
Make sure you understand what types of queries they are useful for, and how their properties differ from those of B-trees.
大家一定要理解他们分别适合于哪种类型的查询，并且理解他们的属性是怎么有别于B树。
Each table consists of one B-tree that contains the data, although there can be many secondary index B-trees used to provide different views of the data.
尽管可能有许多用于提供不同数据视图的辅助性索引B树，但每个表均由一个包含数据的B树组成。
Specifically, we changed the B-Trees storage mechanism so that the B-Trees would be rebuilt in the update areas, not necessarily rebuilding everything all of the time.
具体地说，我们修改了B -树存储机制，只在更新区域重新构建B -树，而不必总是重新构建整个B -树。
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