Hexamethylolmelamine (hmm)
[化] 六羟甲基蜜胺; 六羟甲基三聚氰胺
🗣️ 情景例句
How about guests?
来宾呢？
Education has for its object the formation of character.
教育的目的在于培养品德。
We are so familiar with the fact that man ages,
我们对人总是要衰老的现象并不陌生，