Lactone
n. [化] 内酯
🗣️ 情景例句
Are you traveling alone or whth a friend?
你是一个人旅行还是结伴旅游？
Do you ever go swimming on the weekend?
你曾经在周末去游泳吗？
You've done a wonderful job. Well done! Well done!
你真做得太棒了！