Ferroxdure
永久磁铁(材料), 钡铁氧体(商品名)
🗣️ 情景例句
We have around 3,000 workers.
大约有3000名职工。
It is a small flock that has not a black sheep.
家家难免有败类。
(The farmer returns the pan.)
（农民还锅）