북한을

북한을

"북한을" means "North Korea" in the accusative case (as the object of a sentence).

Here, '북한을' is the direct object of the verb '방문하다,' meaning 'to visit.' It indicates the subject's desire to go to North Korea.

나는 북한을 방문하고 싶어요.

I want to visit North Korea.

In this sentence, '북한을' serves as the direct object of the verb '연구하다,' meaning 'to study' or 'to research.' It refers to scholars focusing their studies on North Korea.

북한을 연구하는 학자가 많아요.

There are many scholars who study North Korea.

Here, '북한을' is again the direct object, this time for the verb '이해하다,' meaning 'to understand.' It indicates the entity the effort is directed toward.

그들은 북한을 이해하려고 노력합니다.

They try to understand North Korea.