Injective
[计] 内射, 单射
🗣️ 情景例句
Did they write some bad news?
他们写了什么坏消息吗？
The meeting is put off.
会议延期了。
It's the library's. Please be more careful from now on!
“是图书馆的书。从现在起请你倍加小心！”