Lactone
n. [化] 内酯
🗣️ 情景例句
All my bags are checked in. I guess I'm all set to go.
我的行李都检查完了，看来我可以走了。
The wise man has long ears and a short tongue.
聪明人耳朵长，嘴巴短。
Hello.Where you at the butcher's?
您好。刚才您在肉店里吗？