The past appears in tracks  left by passersby, and by the warmth  of a recently parked car where the residue of where you've been and what you've done recently.
과거가 흔적으로 남는다는거죠. 오가는사람, 방금 주차했던 차의 온기, 여러분이 있었던 곳의 잔여물, 최근에 무엇을 했는지등이 말이죠.