They further report that it is possible to exit these buildings at ground level, but as soon as they no longer have a direct view of the ground floor of the building, it again becomes impossible to locate.
이건 '1층으로 나갈 수는 있지만, 나간 이후에 1층을 직접 보지 않게 되면 다시 (건물 밖에서) 1층까지 갈 수 없다'는 뜻 같습니다.
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