The left ear with the right ear
"Boy, why have you got cotton-wool in your ear? Is it infected?" "No, sir, but you said yesterday that everything you told me went in one ear and out the other , so I am trying to stop it."
左耳朵與右耳朵
“孩子，你為什麼用棉花塞住耳朵?它感染了嗎?”
“沒有，老師。可是你昨天說你告訴我的知識都是一個耳朵里進，一個耳朵里出，所以我要把它堵在裡面。”