Within a small compass hundreds or thousands of feet of grid edges divide and re-divide the stream so that all particles must pass through a succession of strongly convergent magnetic fields.

小罗盘上有成百上千的栅格边，可将溪流分开或再分，这样，所有粒子都要通过一系列吸附性的强磁场。

youdao

He splashed over to the foot of the stairs and looked up at a ladder of water coming down, a scrim of ice on the edges like a mountain stream.

NEWYORKER: Idols