0 If a sound echoes, you hear it again and again, usually because you are in a large, empty space. -- 메아리치다, 소리가 울리다
1 a sound that you hear more than once because you are in a big, empty space -- 메아리
We can complete it step by step however long the road is and it can't be completed however short the road is if you don't even mark your footprint.
길이 아무리 길어도 차근차근 완주할 수 있고, 발자국을 표시하지 않으면 아무리 길이 짧아도 완주할 수 없습니다.