Naphthoquinoxaline
1, 4-二氮杂蒽
🗣️ 情景例句
Will I be able to receive the goods by the end of September?
我可以在9月底以前收到货吗？
I have no leisure time to play golf.
我没空闲打高尔夫球。
I didn't mean to offend you.
我不是故意冒犯你。