| 释义 |
It shows the presence of a magnetic field.这表明有磁场存在。A meteorite collided with Earth at the same time, delivering a one-two punch to the magnetic field.同时，一颗陨石撞上了地球，给磁场造成了双重打击。The secondary current sets up a magnetic field inside the tube.二次电流在管子内部会产生磁场。 |