Mercaptotropolone
巯基酚酮
🗣️ 情景例句
How are you?
好吗？
My brother took lessons on the trumpet for nearly ten years.
我的兄弟有将近10年的时间听小号的课了。
No, I haven't. Why? Have you?
没有，我没有。怎么啦？你有吗？