Bijective
[计] 双射的
🗣️ 情景例句
There are three things that have to be done first, Harry.
首先我们必须做三件事， Harry。
He that doth most at once doth least.
想一次做完什么事，结果一件也做不完。
What have you enjoyed most?
你最喜欢什么呢？