This is the 441st most frequent Korean word.
차이가
"Difference."
Here, '차이' refers to the difference, in this case, specifically related to age, characterized by the attribute '큽니다' (is big).
그들의 나이 차이가 큽니다.
The age difference between them is significant.
Here, '차이' conveys the notion of differences in culture, which influence an outcome or perspective, as described by '깊게 만듭니다' (make deep).
문화적 차이가 우리의 이해를 깊게 만듭니다.
Cultural differences deepen our understanding.
In this sentence, '차이' denotes the disparity or gap, particularly concerning academic performance, and the usage reflects a dynamic change described by '줄어들고 있습니다' (is narrowing).