1·We haven't found any convincing evidence that selectivity or prestige matters.
我们还没有找到任何有说服力的证据来证明选择性或声望很重要。
2·At the same time, we also have found differences in signal selectivity that may allow us to target some bacteria while ignoring others.
同时，我们还发现了信号选择性的差异，这能够使我们针对一些特定的细菌而不影响到其他。
3·However, in the absence of data distribution information, the optimizer will calculate selectivity for filters of different types based on table indexes.
然而在缺乏数据分布信息的情况下，优化器将基于表索引计算不同类型筛选器的选择性。
4·This information can then be included as part of the optimizer decision during costing for selectivity and cardinality estimates for qualified queries which do not need to reference the view directly.
然后，这些信息被包括进来，用于帮助优化器在为那些符合条件的查询(这些查询不需要直接引用视图)的选择性估计和基数估计计算成本时做决定。
5·This can occur if the IN list contains parameter markers or host variables which prevent the optimizer from using catalog statistics to determine the selectivity.
如果 IN 列表中包含参数标记符或主机变量，使优化器不能使用编目统计信息来确定选择性，就会出现这种情况。
1·Each join reduces the size of the fact table by one-tenth due to selectivity of the table filter on each dimension table.
由于每个维度表过滤的选择度，每次连接都会减少事实表大小的十分之一。
2·In terms of sensitivity and selectivity, the current technology out there is still inferior. The dog has amazing capability and identifying some really really minor amount of explosive.
但说到灵敏感和选择度，目前现有的科技设备还处于劣势。狗有令人称奇的辨识本领，他们甚至能嗅到含量极少的爆炸物。
3·Distance join is widely used in spatial database. Selectivity estimation for distance join is the basis of optimizing the query of the distance.
距离连接在空间数据库中有着广泛的应用，而距离连接的选择度估计是优化距离查询的基础。