Surjection
[数]满射
🗣️ 情景例句
I owe you an apology for what I did last night.
我应该为昨天晚上的事向你道歉。
It can't be helped.
无能为力。
The undulating waves of the open sea are generated by three natural causes:
海浪是由三个自然因素形成的：