Purpuroxanthene
[化] 1,3-二羟基蒽醌
🗣️ 情景例句
That's not the issue.
那不是我们讨论的话题。
We never know the worth (or value) of water till the well is dry.
井枯方知水可贵。
The secretary worked late into the night, preparing a long speech for the president.
秘书工作到深夜，为总统准备发言稿。