Beryllia
氧化铍
🗣️ 情景例句
I am on speaking terms with him.
我和他只是泛泛之交。
I don't care.
我不在乎！
Advertisers discovered years ago that all of us love to get something for nothing.
做广告的人们多年前就发现我们大家都喜欢免费得到东西。