Carboxylic
[机] 羧基的
🗣️ 情景例句
May I ... may I help?
我能……我能帮上忙吗？
Let me give you an indication.
我可以提示一个想法。
There was no doubt that we were unwelcome visitors.
毫无疑问，我们的来访是不受欢迎的。