Irreplaceableness
n. irreplaceable（不能恢复原状的）的变形
🗣️ 情景例句
If I work hard now, when I retire I'll be very well off financially.
如果我现在努力工作的话，退体后就会很富有。
To work overtime
加班
What did you eat yesterday?
你昨天吃了什么呢？