Polyketide
聚酮化合物
🗣️ 情景例句
How does that look, Rob?
看起来怎么样，Rob？
Your niece is engaged,isn't she?
你的侄女订婚了，是吗？
He was amused too, because he never expected the bicycle to be found.
但又感到非常好笑，因为他从未指望那辆自行车还能找到。