Preimage
逆象, 原象, [数]前象
🗣️ 情景例句
I graduated from Nanjing University in June, 2000.
我2000年6月毕业于南京大学。
A book is the same today as it always was and it will never change.
一本好书今天如此，将来也如此，永不改变。
and content in the thought that what was possible has been done.
想到能做的事都做了，也就坦然了。