Preimage
逆象, 原象, [数]前象
🗣️ 情景例句
Are you all right?
你怎么了？
Were it left to me to decide whether we should have a city without bikes or one without cars.
如果让我来决定我们要一个没有自行车的城市，还是要一个没的汽车的城市。
Very interesting.
很有意思。