Polyketide
聚酮化合物
🗣️ 情景例句
Your transmission is shot!
你的传动箱坏了。
I'd like to speak to Mr. Jack.
我要和杰克先生讲话。
Firemen had been fighting the forest for nearly three weeks before they could get it under control.
消防队员们同那场森林大火搏斗了将近3个星期才最后把火势控制住。