Polymethylene compound
[化] 聚亚甲基化合物
🧩 词语组成解析
n. [化]聚亚甲基
🗣️ 情景例句
That's easy.
这很容易。
It's December.
现在是十二月。
The conference was very well organized. Everything began and finished on time.
会议安排的很好。开始和结束都准时。