This cation is attracting the chloride next to it and it is repelling the sodium as the next nearest neighbor.

这一阳离子被邻近的氯离子所吸引,并排斥钠离子,因为这是其最邻近的离子。

麻省理工公开课 - 固态化学导论课程节选

many of these ion channels have this size exclusion pore, it's a very important part of them.

很多离子通道也都有这样的具有尺寸排斥性的小孔，这是它们非常重要的组成部分。

麻省理工公开课 - 化学原理课程节选