This is the 6361st most frequent Korean word.
악장에서는
"In the movement" (referring to a section of a musical composition).
Here, '악장에서는' specifies the particular section in a musical piece being discussed, namely the first movement, implying an introductory narrative.
악장에서는 주제를 처음 도입합니다.
In the first movement, the theme is introduced.
In this context, '악장에서는' conveys the section of the composition under discussion where instrumental harmony plays a key role.
악장에서는 악기의 조화가 중요합니다.
In the movement, the harmony of instruments is important.
Here, '악장에서는' is used to preface commentary about the emotional expressiveness of the melody in a specific section.