Lactone
n. [化] 内酯
🗣️ 情景例句
What are the best exercises for my health?
什么是最利于我身体健康的锻炼方式？
If you were to attend the banquet ,what would you wear?
如果你将出席宴会，你将穿什么？
It was mailed last week.
上个礼拜我们还没收到。