Polymethylene
n. [化]聚亚甲基
🗣️ 情景例句
About eight o'clock?
差不多八点钟好吗？
I can't believe it.
我不相信。
he knows while he looks at one side what the other side is like;
他看物体的一边时，便知道另一边是个什么样子。