What exactly does "key" mean, in the context of B-Trees?
“关键”到底是什么意思，在b树吗？
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。
JFS2 also makes use of B + trees for fast directory lookups as well as managing extent descriptors.
JFS2还使用了B +树，以便更快地查找目录和管理分区描述符。
Application of ca and B as nutrients for fruit trees is common in recent years, since they affect the quality and storage tolerance of fruits.
近年来，钙、硼在果树上的应用十分广泛，它们对果实品质及耐贮藏性具有重要的影响。
We use theory of trees, B-series, P-trees and P-series to deduce the order conditions of the methods constructed.
分别应用根树、B -级数理论、P -根树、P -级数理论推导方法的阶条件。
The following spring, 60% of aphids nesting in green trees had survived, compared with only 29% of those in the red trees, he reports today in the Proceedings of the Royal Society B.
在第二年的春天，在绿色叶子的果林中，60%的蚜虫存活了下来，而相对的，在红色叶子的过林中，存活率仅有29%。现今，他在皇家学会B的学报中发布了这个结果。
The following spring, 60% of aphids nesting in green trees had survived, compared with only 29% of those in the red trees, he reports today in the Proceedings of the Royal Society B.
在第二年的春天，在绿色叶子的果林中，60%的蚜虫存活了下来，而相对的，在红色叶子的过林中，存活率仅有29%。现今，他在皇家学会B的学报中发布了这个结果。
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