Diglycolamine
二甘醇胺
🗣️ 情景例句
Have you been waiting for me for a long time?
你已经等我很久了吗？
What did you do the week before last?
上上星期你干了什么？
A good knowledge of English will improve your chances of employment.
英语好将有助于增加你们的就业机会。