Polyformaldehyde
聚甲醛
🗣️ 情景例句
I need to cancel that. We have had a last minute change of plans.
我要取消预约，我们临时改变计划了。
No man learns but by pain or shame.
不经痛苦羞辱，难以取得教训。
I'm going to buy a few bananas.
我打算买几个香蕉。