Beryllocene
二茂铍
🗣️ 情景例句
May I help you, sir?
需要我帮忙吗，先生？
I've been here for three weeks, and so far I've enjoyed it.
我已经在这里逗留了三个星期，到现在为止，我过得很好。
I'd like to get this film developed.
我要冲洗这卷胶卷。