Now by coming closer to an object, you'll hear the sound slowly changing, telling you how far the object is and little by little you will be able to make a map in your head of where you are, just like a bat.
現在,靠近一個物體,你會聽到聲音慢慢變化,告訴你這個物體有多遠,一點一點地,你就能在腦海中繪製出你所在的地圖,就像一隻蝙蝠一樣。