这些离子通道都有的一部分，就是所谓的选择性过滤器，这个过滤器，会滤过允许穿过的离子。
What all of these channels have is what's called a selectivity filter, so this filter filters out the type of ion that's going to be allowed through.
在这一模型中，离子通道的选择性过滤器主要处于三个态，一个三离子态和两个两离子态，转导过程用这三个态之间的相互跃迁来描述。
In this model, ion conduction involves transitions of three states, with one three-ion state and two two-ion states in the selectivity filter respectively.
首先在逻辑上将表与其自身连接，然后将更具有选择性的非起始索引键作为索引绑定过滤器，应用于起始键值的每个惟一的组合。
The table is logically joined to itself, and the more selective non-leading index keys are applied as index bound filters to each unique combination of the leading key values.
公平而论，这只是评估基于规则的过滤器，而没有针对分布式黑名单做选择性的检查。
In fairness, this only evaluated the rule-based filters, not the optional checks against distributed blacklists.
公平而论，这只是评估基于规则的过滤器，而没有针对分布式黑名单做选择性的检查。
In fairness, this only evaluated the rule-based filters, not the optional checks against distributed blacklists.
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