Ampangabeite
钶钛铁铀矿, 铌钇矿
🗣️ 情景例句
When did the Roman Empire come into being?
罗马帝国是什么时候形成的？
I ought to stay at home.
我应该留在家中。
and secondly, those whose work and pleasure are one.
第二类人的工作和娱乐是一回事。