Hexenic acid
[化] 己烯酸
🧩 词语组成解析
🗣️ 情景例句
Here's $ 1000 for the trip. Use some of it for stamps.
这里是1000美元，给你当旅费。要把一些用来买邮票啊！
It's easy to fall into a trap, but hard to get out again.
堕入陷阱易，脱离陷阱难。
What's the matter with him, doctor?
他得了什么病，医生？