Pentynoic acid
[化] 戊炔酸
🧩 词语组成解析
🗣️ 情景例句
We will help your children in learning lessons in their free time.
我们可以帮助您的孩子在他们空闲时学习功课。
Sorry, it's broken. You have to use the stairs.
对不起，它坏了，你只能走楼梯了。
Well, I'll have tea by myself.
好吧，我一个喝茶了。