Polymethylene
n. [化]聚亚甲基
🗣️ 情景例句
If you don't think it's any good, Please say so.
如果你认为写得不好，请照实说。
What? Already? Won't you have more coffee?
怎么，已经要走了？要不要再喝点咖啡？
Here's another photo of Lily. Look! She's swimming very well.
这儿有莉莉的另一张照片。看！她正在游泳，游得非常好。