Retroactivity
n. 追溯既往\\n[法] 溯及既往, 追溯效力
🗣️ 情景例句
In ancient times the rich used jade or gold chopsticks to display their wealth.
在古代，富人家用玉或金子制成筷子以显示其家庭的富有。
Thank you.
谢谢你。
She is a composer for the harp.
她是位写竖琴曲的作曲家