求翻译：加工中相对运动的存在使磁粒沿加工面滑动的同时出现滚动，磁粒间不断地更换位置，使其具有极好的自锐性，它不象普通砂轮那样，存在堵塞和磨粒的钝化现象。这在很大程度上提高了磁粒加工的效率；是什么意思？

Scrolling the existence of the relative motion of magnetic particles at the same time sliding along the machined surface processing, magnetic particles continue to change locations, it has excellent self-sharpening, it is not like ordinary wheel, there is blockage blunt and abrasive phenomenon. This

Relative motion processing in the presence of the magnetic particles along the side of the slide appear at the same time, the magnetic grain-scroll constantly change position, so that it has a very good self-determined, it is not like ordinary stone, there is blockage and abrasive particles passivat

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Processing of relative motion in the magnetic abrasive machining of sliding both scroll bars appear, constantly replace the location of magnetic particles, making it excellent self-sharpening, it is not like a regular wheel, the blockage phenomenon of passivation and debris. This is to a large exten

In the processing the relative motion existence causes magnetism grain to appear the trundle along machined surface glide at the same time, magnetism intergranular changes places unceasingly, enable it to have extremely good from sharp, it does not look like ordinary grinding wheel such, existence j