Polyketide
聚酮化合物
🗣️ 情景例句
I've invited you here for the weekend to help celebrate.
我邀请你们到这儿来渡周末， 一起庆祝。
Our family always has a traditional Christmas.
我们家每年都要庆祝传统性的圣诞节。
Would you mind if I smoked in the office next door?
我在隔壁吸烟可以吗？