Polymethylene
n. [化]聚亚甲基
🗣️ 情景例句
Which tourist attractions are the best?
哪一个旅游景点最好？
That's your book.
那是你的书。
He was on his way to a lecture, when a tourist stopped him and asked him for directions.
他走在去听课的路上，此时一位游客拦住他问路。