Ferroxdure
永久磁铁(材料), 钡铁氧体(商品名)
🗣️ 情景例句
She is giving me piano lessons in exchange for her English classes.
我教她英语，她教我弹钢琴。
He who says what he likes shall hear what he does not like.
欢喜说他欢喜的话者将要听到他不欢喜的话。
Yes, we are, thank you!
是的，现在好了，谢谢您！