I know nothing but Wikipedia is a cyclopedia which is easy to use,free and grow continuously.

我只知道维基是一个非常好用的，免费的，不断成长的百科全书。

Definition form Wikipedia: A degauss causes a magnetic field to oscillate rapidly, with decreasing amplitude.

摘自维基百科的定义：消磁器产生度递减的快速交变磁场。