Bijection
[计] 双射, 一一对应
🗣️ 情景例句
Do you have any coupons?
你们有优惠卡吗？
She is tickling her baby.
她在咯吱她的小宝宝。
The remains of plants and animals that lived on land are much more rarely preserved, for there is seldom anything to cover them over.
曾在陆地上生活过的动植物的遗体被保存下来的更为罕见，因为陆地上几乎没有什么东西覆盖它们。