• And all ion channels are selective for a single type of ion, and we can think about how that selectivity takes place, and that's where this idea of atomic radius is going to become very important.

    所有的离子通道都是仅对某一种离子具有选择性的,而我们可以来想一想这种选择性是如何发生的,这也就是原子半径这个概念将会变得,非常重要的地方。

    麻省理工公开课 - 化学原理课程节选

  • 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.

    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。

    麻省理工公开课 - 化学原理课程节选

  • Our ears have only evolved to respond to sound with very high sensitivity and high selectivity.

    人类的耳朵对声音的反应,极为敏感,也极有选择性。

    斯坦福公开课 - 7个颠覆你思想的演讲课程节选

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