Metaformaldehyde
[化]变甲醛, 聚甲醛
🗣️ 情景例句
I hear they intend to marry.
我听说他们打算结婚。
But we cannot afford to depend on tradition alone.
但是我们不能靠吃老本过日。
Were there any letters for me this morning?
今天早上有我的信吗？