Invalidness
n. invalid的变形
🗣️ 情景例句
Thank you. I will be there on time.
谢谢你，我会准时到的。
Knowledge comes from experience alone.
知识来自经验。
In the beginning they used to carve Chinese characters on stones to record important dates in history.
开始时，他们常把汉字刻在石头上，记载历史上重要的日期。