Nilfactor
[医] 零因子
🗣️ 情景例句
I've got it. This one's on me.
我都付了。这一顿我请客。
Are there reserved seats on the train?
车上有预订座位吗？
Yes, it's here, in my bag. What about yours?
有，在这儿，在我的提包里。你的票呢？