网络 The two poles of a magnet
You may wonder why the magnet ´s poles point north and south.
你会感到好奇,为什么磁铁的两极会指南北呢?
—— 给力词典精选You may wonder why the magnet´s poles point north and south?
你可能会感到奇怪,为什么磁铁的两极会指向南北呢?(加了数词)
—— 给力词典精选DTCXG - 08 magnetic tube is between the two poles of C-shape electromagnet and a glass tube is installed as reciprocating and swing.
08型磁选管是在C形电磁铁的两极之间,装有玻璃管,作往复移动和旋摆。
—— 给力词典精选The use of a circular cross-section of the electromagnet´s poles.
利用横截面为圆形的电磁铁的两极。
—— 给力词典精选