Beryllonite
磷(酸)钠铍石
🗣️ 情景例句
Donald passed away a couple of years ago.
Donald几年前去世了。
I still have to fill 16 hours in my major.
我必须重修主修科目16小时。
Hi, this is Steve. Is Pippa there?
你好。我是史蒂夫。皮帕在那吗？