Metaformaldehyde
[化]变甲醛, 聚甲醛
🗣️ 情景例句
How's your son getting on with his English?
你儿子的英语学得好吗？
A penny saved is a penny gained.
省一文是一文。
Despite the new tunnel, there are still a few people who rashly attempt to cross the Pass on foot.
尽管修通了隧道，但仍有一些人想冒险徒步跨越圣伯纳德山口。