Preimage
逆象, 原象, [数]前象
🗣️ 情景例句
I'll come and give you a hand tomorrow.
我明天来帮你忙。
Sail while the wind blows; wind and tide wait for no man.
驶船要乘风，风潮不等人。
His answer was to lift the vessel out of the water by making it ride on a cushion of air,
他的解决办法是把船体提离水面，让船在一个气垫上行驶，