Ybco
abbr. yttrium barium copper oxide 钇钡铜氧化物
🗣️ 情景例句
Hi.
嗨，
Mother begins baking cookies two weeks before Christmas.
自圣诞节的两周以前，母亲就开始做小甜饼了。
He doesn't care about me.
他并不在乎我。