Lactone
n. [化] 内酯
🗣️ 情景例句
Yes, let me try. Oh, it's difficult. Will you show me how to do it?
好吧，让我试试吧！哦，真不容易。能教我怎么用吗？
A bad thing never dies.
坏事传千年。
Are you in Row 4?
你是在第四排吗？