Dibutoxy
二丁氧基
🗣️ 情景例句
Sometimes.
有时候。
We are very proud and honored to have a distinguished group of guests such as you to our company.
我们为能请到您这肃尊贵的客人而深感骄傲和荣幸。
I have a letter of introduction here.
我这儿有一封介绍信。