Arrhenite
铍钽铌矿, 蚀变的褐钇铌矿
🗣️ 情景例句
I speak the Shanghai dialect and the Mandarin.
我会讲上海话，普通话。
I wish you to be more careful.
我希望你更谨慎。
What are you doing, Mum?
妈妈，你在干什么？