Polyketides
聚酮
🗣️ 情景例句
I'm afraid the cardboard boxes are not strong enough for transport by sea.
我担心这种纸箱，用于远洋运输，不够结实。
He is rich enough who has true friends.
有真朋友的人是富翁。
We shall all remember Mr.Page for his patience and understanding and for the kindly encouragement he gave us when we went so unwillingly to school.
我们不会忘记佩奇先生对我们既有耐心又充满理解，也不会忘记在我们不愿去上学时他给予我们的亲切鼓励。