Nuclear magnetic resonance is a subject which studies the phenomenon of resonance absorption when nucleus was placed in the stationary magnetic field and act with applied high frequency fields.

• 核磁共振是原子核的磁矩在恒定磁场和高频磁场同时作用，且满足一定条件时所发生的共振吸收现象，是一种利用原子核在磁场中的能量变化来获得关于核信息的技术。