Beryllia
氧化铍
🗣️ 情景例句
It's OK. I'm sure they meant well,
没有关 。我敢说他们有心帮忙
I often do home work in the afternoon.
我常常在下午做功课。
we can start any time you're ready.
只要你准备好了，我们随时可以开始。