Lactones
(lactone 的复数) n.[化] 内酯
🗣️ 情景例句
Where are you from?
你是从哪儿来的？
I am Chen Jianguo. I am from Shanghai, China.
我叫陈建国，来自中国上海。
He spent most of his life gathering money.
他一生大部分时间用来积聚钱财。