来自《耶鲁大学开放课程：生物医学工程探索第21集第21集》

It's called nuclear magnetic resonance because it involves--

之所以将它称为核磁共振是因为
it depends on the particular properties of the nuclei of atoms,

这项技术取决于原子核的属性
that is the number or protons, the number or neutrons.

包括质子的数量中子的数量
It's magnetic, because a magnetic field

所谓"磁" 是因为磁场是
is required in order to align the ions.

令离子有序排列的必要条件
It's called resonance because you're looking for a resonance

而所谓的"共振"则是因为你需要
between the excitation of these molecules,

在这些激发的分子中
these aligned molecules, aligned in a magnetic field

这些在磁场当中有序排列的分子当中
which are exciting them with radio frequency waves.

发现那些被无线电波所激发的共振
You're looking for a particular resonance

你要在外加磁场和
between the magnetic field that's applied

以无线电波形式施加的激发当中
and the stimulation that you give with radio frequency.

寻找一个特定的共振