Ethacetic acid
[化] 丁酸; 正丁酸
🧩 词语组成解析
🗣️ 情景例句
Richard, isn't that too much to ask of your mother?
Richard，那是不是太麻烦你母亲啦？
I know the boy whose father is a captain.
我知道那个男孩的父亲是船长。
We'll have to cancel if we don't get that order soon.
如果不能很快拿到货，我们只有取消啦。