Such systems face an additional contribution to the inhomogeneity of the radio frequency (RF) field when high magnetic fields are applied.

当施加高磁场时，这种系统会面临对射频(RF)场不均匀性产生额外作用的问题。

youdao

Large stars end in the more spectacular explosions known as supernovae, which generate fast-moving particles in extraordinarily high magnetic fields.

BBC: Gamma rays from nova explosion surprise astronomers

That conundrum was solved by getting the high-frequency signals to penetrate deeper using alternating waves of electric and magnetic fields.

ENGADGET: Stanford researchers make heart implant powered by radio waves, put batteries out of a job