Retrometamorphism
退向变质作用
🗣️ 情景例句
I got the first round.
第一轮我请的客。
When the owl sings,the nightingale will hold her peace.
枭鸟唱歌，夜莺屏息。
You'd better finish the work today, and bring it tomorrow.
你最好今天完成这作业，明天把它带来。