Polyformaldehyde
聚甲醛
🗣️ 情景例句
I worked to put together a book of photographs.
我的工作是创作出一本摄影书。
The roofer is patching the roof with metal.
屋面防水工在用铁皮修补屋顶。
Yes, here you go.
喏，就是这个。