Ferrocolumbium
铁铌合金, 铌铁
🗣️ 情景例句
Well, it's too bad that you have to go.
真遗憾，你要走了。
Some people sometimes ask me what is the secret of such a tremendous growth.
有时有人问我取得如此惊人增长的秘密是什么。
Come upstairs and see it.
到楼上来看看吧。