In the experiment, the compass detected magnetic fields with a strength between 0.1 gauss, which is less than the Earth's magnetic field, and 200 gauss, which is stronger than a small iron magnet.
在试验中，罗盘探测到的磁场强度范围从低于地球磁场的0.1高斯到高于一小块磁铁的200高斯。
2
When a magnet is freely suspended it becomes a compass.
把一块磁铁随意地悬挂起来，它就会变成一个指南针。
3
If you bring a permanent magnet near a compass and move it around, the compass will react.