Polyacetals
聚缩醛(树脂)
🗣️ 情景例句
And it wasn't just ice cream, was it?
这惊喜还不仅是冰淇淋， 对吗?
If I had known her telephone number, I would have called her.
如果我知道她的电话号码，我就给她打电话了。
Here you are. Put them on, please. You must look after your clothes.
给你们，穿上吧！你们要好好保管你们的衣服。