Ferroxdure
永久磁铁(材料), 钡铁氧体(商品名)
🗣️ 情景例句
This is my sister Susan.
这是我妹妹Susan。
Mr. Ken Robert comes to us from the University of Kentucky where he is majoring in economics.
罗伯特.金先生来自肯塔基大学，主修经济学。
It suddenly occurred to one of the workers to open up the box.
突然一个工人想到打开箱子看看。