ÀλýÀº ÀÚÀü°Å¸¦ Ÿ´Â °Í°ú °°´Ù. ±ÕÇüÀ» ÀâÀ¸·Á¸é ¿òÁ÷¿©¾ß ÇÑ´Ù.Life is like riding a bicycle. To keep your balance you must keep moving.