Metaformaldehyde
[化]变甲醛, 聚甲醛
🗣️ 情景例句
Good night, Susan.
再见， Susan。
For some time now, he has contemplated moving to America.
他长久以来就在考虑移居美国了。
Where does Bill sit in the classrooom?
比尔坐在教室的那块儿？