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
Right.
对。
As they sow, so let them reap.
种瓜得瓜，种豆得豆。
There is a boat in the river.
小河里有一条船。