This is the 129th most frequent Korean word.
이들은
"They" or "these people."
"이들은" is used as the subject of the sentence, referring to a specific group of people.
이들은 도시에 살고 있습니다.
These people are living in the city.
"이들은" refers to a specific group and their recurring activity on weekends.
이들은 주말에 자주 산책을 합니다.
These people often go for walks on weekends.
"이들은" emphasizes the group being referred to in the context of their activity at school.