Danthron
[化] 丹蒽醌; 1,8-二羟基蒽醌
🗣️ 情景例句
The game was put off due to heavy rain.
由于下大雨，比赛延迟了。
How much will all this cost?
一共要花多少钱呢？
I know. I can help him with most of his subjects.
我知道。我可以帮助他学习绝大多数科目。