Dga
[医][=diglycol amine]二甘醇胺
🗣️ 情景例句
He's so funny.
他很逗趣。
A good beginning is half done.
良好的开端，就是成功了一半。
Imagine a pen attached to the weight in such a way that its point rests upon a piece of paper on the floor.
假定把一支笔拴在重物上，笔尖落在地板上的一张纸上，