Hn1
[化] 2,2'-二氯三乙胺
🗣️ 情景例句
Did you have dinner, Robbie?
你吃晚餐了吗， Robbie？
Politeness is to do and say the kindest thing in the kindest way.
文雅就是善良地做事，和善地说话。
Oh,They will be very happy to see you again.
噢，又见到你们，他们会很高兴的。