toroidal magnetic field

例句：

1. 1. The toroidal shape of the satellite makes it difficult to launch.
   卫星的环形形状使得发射困难。
2. 2.The toroidal field is responsible for the rotation of the Earth's axis.
   环形磁场负责地球自转。
3. 3. The toroidal structure of the magnetosphere is a result of the magnetic field lines flowing around the planet.
   磁层的结构是磁场线围绕行星流动的结果。