Yán / jiū / rén / yuán / zhèng / zài / cè / liáng / cí / chǎng / duì / dài / diàn / lì / zǐ / de / zuò / yòng / lì研究人员正在测量磁场对带电粒子的作用力。The researchers are measuring the force exerted by the magnetic field on charged particles.