As babies engage with caregivers, they soon realize that, well, there is something between the ears that is very important -- it's invisible, you can't see it, but it's really critical.
아기들이 돌보는 사람과 교감할 때,  그들은 곧 깨닫습니다 그들의 귀를 통해 무언가 매우 중요하고 눈에 보이지 않지만, 대단히 중요한