Rosigenin
二羟基二甲基氧螺癸烯二酮
🗣️ 情景例句
I understand you used to be in the construction business,
听说你过去从事建筑业
We've got to get a sofa and a chair for the living room.
我们必须有一张沙发和椅子放在客厅。
No, I don't think we have.
我想没有。