Ferramic
粉末状的铁磁体
🗣️ 情景例句
I like to study in the library because it's so quiet.
我喜欢在图书馆学习因为那儿很安静。
No practice, no gain in one's wit.
吃一堑，长一智。
Though he is young, he knows a lot.
尽管小，他懂得多。