1、I think they forgot to demagnetize it.
我想他們忘了給它消磁了。

2、Don't put magnets near credit CARDS because it might demagnetize them.
不要把磁棒靠近信用卡，可能會使卡消磁。

3、How do I demagnetize tape heads?
我如何消磁音帶頭？

demagnetize翻譯