Polyketide
聚酮化合物
🗣️ 情景例句
When was your reservation?
您预定的是什么时候？
I live at 1203 Washington Street.
我住在华盛顿街1203号。
Shortly afterwards, four more policemen arrived and remonstrated with the workmen.
一会儿工夫，又来了4个警察，规劝工人离开。