Polyketides
聚酮
🗣️ 情景例句
She owes her good health to her regular life.
她把健康归功于规律的生活。
His toe is swollen, Does it hurt?
他的脚趾肿起来了，疼不疼？
Once the oxygen content of the air had risen to 25% it was ready to burn.
一旦氧气在空气中的含量达到25%，它就要燃烧。