Turns out the size of the electric field is inversely proportional to the separation distance.

电场的大小和分离距离成反比。

youdao

This meant that the separation distance had to be equal to a multiple of the half-wavelength of the sound waves.

这意味着，固定距离等于声波的半波长的倍数。

youdao

If this separation distance were changed even slightly, the standing wave pattern would be destroyed and the levitation would be lost.

如果这种分离距离稍微改变，驻波模式将被破坏，将导致浮悬不能发生。

youdao

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

The study recommended a minimum vertical separation distance between fracking wells and water supplies of 600m (2, 000ft).

BBC: Fracking: Untangling fact from fiction

In the specific case of maize, to ensure that seed stocks achieve 99.9% purity, a separation distance of 200 metres is required from any source of "contaminating" maize pollen.

BBC: GM trial 'no threat to organic centre'

It estimates more than 11% of the island's 68, 900 population has put their name to the petition which calls for a ban on commercial wind turbines in any Area of Outstanding Natural Beauty and a separation distance of at least 1.5km (0.9 miles) from housing.

BBC: 8,000 sign Anglesey petition against wind turbines