Polymethylene
n. [化]聚亚甲基
🗣️ 情景例句
Here's a brief description
这是一份简单的记录
A word spoken is an arrow let fly.
一言既出，驷马难追。
I was very tired when I arrived home. I'd been working hard all day.
我到家时非常累。我一整天都在玩命地干！