力偶具有相等磁性的两个力,平衡作用但反向,能导致旋转但不能造成平移 A pair of forces of equal magnitude acting in parallel but opposite directions, capable of causing rotation but not translation.
逆流,反向电流;逆电流与另一水流或电流的流向相反的水流或电流 A current that flows in an opposite direction to the flow of another current.
救护车发动机罩盖上标有逆序反向字母的AMBULANCE字样。 Ambulances have `AMBULANCE' printed in reverse on their bonnets.