This is the 10676th most frequent Korean word.
군용헬기는
Military helicopter.
Here, '군용헬기는' means 'military helicopters' and is used as the subject to describe their role in transportation of supplies.
군용헬기는 물자를 이송하는 데 사용됩니다.
Military helicopters are used to transport supplies.
In this sentence, '군용헬기는' refers to 'the military helicopter' as the subject emphasizing its significant contribution within the context of the specific mission.
군용헬기는 이번 작전에서 중요한 역할을 했습니다.
The military helicopter played a vital role in this mission.
'군용헬기는' again is used as the subject of the sentence, highlighting the features of speed and durability associated with military helicopters.