low-frequency electromagnetometer

例句：

1. 1.This low-frequency electromagnetometer can detect the magnetic field of the Earth's core.
   这个低频电磁测量仪可以探测地球内核的磁场。
2. 2. The scientist used this low-frequency electromagnetometer to study the behavior of magnetized particles.
   这位科学家使用这个低频电磁测量仪研究磁化粒子的行为。
3. 3. The low-frequency electromagnetometer was used to measure the strength and direction of the magnetic field around the Earth's surface.
   低频电磁测量仪被用来测量地球表面附近磁场的强度和方向。