刚刚问掉了 occasions are quite rare in which i have the time to spend a day with my kids. 这里为什么不用one就可以 而

题目

刚刚问掉了 occasions are quite rare in which i have the time to spend a day with my kids. 这里为什么不用one就可以 而那句不行
a figurative example is one in which language is used in a non-literal or metaphorical way. 这句为什么一定要是is one.

答案

one是同类不同一,不能代表特指,只能是一个同类的范围