生活中最不可缺少的東西是甚麼？大家心中的第一名一定是手機，第二名對大多數網友們來說應該會選耳機吧! 不管是聽音樂、玩遊戲、談公事…等等…那肯定少不了它!
Since everyone needs it so much, how many people will clean it? What happens if you don't clean it properly?