nuclear electric quadrupole

例句：

1. 1. The nuclear electric quadrupole is used to measure the magnetic fieldin a region.
   核磁共振四极体用于测量一个区域内的磁场。
2. 2. The nuclear electricquadrupole is an important toolfor medical imaging.
   核磁共振四极体是医学成像的重要工具。
3. 3. The nuclearelectric quadrupolehas been used to study thestructure of molecules.
   核磁共振四极体被用来研究分子的结构。