Olefine acid
[化] 烯酸
🧩 词语组成解析
[化] 烯烃; 链烯烃
🗣️ 情景例句
I really must be going now.
现在我真的该告辞了。
Goodbye. Hope to see you again next year.
再见。希望明年再见到你。
Yes. You have to practise a lot.
是的，你得大量的练习。