Polycarboxylic
[机] 多羧酸的
🗣️ 情景例句
It's no use crying over spilt milk. What's done cannot be undone.
覆水难收。
No. Thanks all the same.
不喝了。不过还是得谢谢你。
Though she hesitated for a moment, she finally went in and asked to see a dress that was in the window.
她虽然犹豫了片刻，但终于还是走进了商店，要求把陈列在橱窗里的一件衣服拿给她看。