This is the 19037th most frequent Korean word.
아르바토프는
The word "아르바토프는" does not have a clear definition in Korean and may be a typographical error or a name.
In this sentence, "아르바토프는" is used to indicate the subject by stating "아르바토프" followed by the topic particle "는" to emphasize Arbatov.
아르바토프는 뛰어난 연구원입니다.
Arbatov is an excellent researcher.
Here, "아르바토프는" introduces Arbatov as the topic of the action embedded in the question, which is associated with the context of arrival.
아르바토프는 언제 오는지 아세요?
Do you know when Arbatov is coming?
In this case, "아르바토프는" functions as the subject performing the verb of mentioning important details during the conversation.