Peptidoglycolipid
肽糖脂
🗣️ 情景例句
Sorry to disturb you again.
抱歉， 又来打扰你。
Without health, life is not life, life is lifeless.
如无健康的身体，生活就不成为生活，人生也毫无生气。
What happened before printing was invented?
印刷术发明以前是怎么一回事？