Unsubstituted
未被取代的
🗣️ 情景例句
It's no use crying over spilt milk. What's done cannot be undone.
覆水难收。
This material feel soft, How does that material feel?
这种布料感觉起来很软，那块料子如何呢？
This morning, however, a firemen accidentally discovered the cause.
然而今天上午，一个消防队员偶然发现了起火的原因。