Ybco
abbr. yttrium barium copper oxide 钇钡铜氧化物
🗣️ 情景例句
I'm sorry, all the balcony seats are gone.
抱歉，包厢的票都卖完了。
Today English is the international language of business and trade.
如今英语是商务和贸易的国际性语言。
What is it about?
这是关于什么的？