Polyformaldehyde
聚甲醛
🗣️ 情景例句
Mr. Lu, everything is OK. Your booking is from today through Wendnsday. Single room.
陆先生，没问题的。您从今天订到星期三，单人房。
The sky is not less blue because the blind man does not see it.
天不会因瞎子看不见而减其蓝色。
The third, or main wave,
第三种波，即主波，