Phenothalin
酚酞
🗣️ 情景例句
Yes. At our company, quality control si very important.
是的。在我们公司，质量管理非常重要。
My brother wants to learn how to play the piano.
我的兄弟要去学弹钢琴。
He's been there for over two years. He's been there since two years ago.
他到校有两年多时间了。他两年前就到那儿学习了。