Polymethylene derivatives
[建] 聚甲烯衍生物
🧩 词语组成解析
n. [化]聚亚甲基
派生物
🗣️ 情景例句
Maybe he can do the same thing for your grandfather.
也许他能为你爷爷做同样的事。
Take your time.
慢慢来。
Words can't express what I felt then.
无法用语言形容我当时的感受。