Injective
[计] 内射, 单射
🗣️ 情景例句
My parents expect nothing but high marks.
我父母就希望我考高分。
He likes playing the piano.
他喜欢弹钢琴。
The characters on the paper were white, and the rest of the paper was black.
纸上的汉字呈白色，其余部分成黑色。