Ferroxdure
永久磁铁(材料), 钡铁氧体(商品名)
🗣️ 情景例句
He is,
没有错。
All work and no play makes Jack a dull boy.
只工作，不玩耍，聪明小孩也变傻。
A fine rain began to fall on our heads and the temperature had dropped.
一阵小雨落到我们头上，气温开始下降了。