So, for example, if I have a sodium ion over here, and I have a chloride ion over here, where the distance from center to center r I'm denoting as r, this is nucleus to nucleus separation.

所以，比如这有一个钠离子，和一个氯离子，它们中心与中心间的距离,我把它设为，这是原子核和原子和的间距。

youdao

When you pick up a virtual object, the center of mass of that object and the center of mass you feel in your hand have some real separation.

当你拾起一个虚拟的物体，物体的质心和质心在手上的感觉有些分离。

youdao

Angular momentum for particles, separation of center-of-mass and relative coordinates, effective energy diagram.

微粒的角动量，质心分离以及相对坐标系，有效能量图。

youdao

This is the separation measured from the center of the sodium nucleus.

这就是分离,从钠核中心开始算。

麻省理工公开课 - 固态化学导论课程节选

So, for example, if I have a sodium ion over here, and I have a chloride ion over here, where the distance from center to center r I'm denoting as r, this is nucleus to nucleus separation.

所以，比如这有一个钠离子，和一个氯离子，它们中心与中心间的距离,我把它设为，这是原子核和原子和的间距。

麻省理工公开课 - 固态化学导论课程节选

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