Naphthazin
[化] 氮杂蒽
🗣️ 情景例句
How did the accident happen?
事故是怎么发生的？
Action is the proper fruit of knowledge.
行动是知识的巧果。
Aunt Harriet lived in that leisurely age when servants were employed to do housework.
哈丽特生活在一个悠闲的年代，家务事都由雇来的佣人代劳。