笑话

An Echo
  "Good gracious,you've got the biggest cavity I've ever seen!" the dentist cried as he examined a new patient. "THe biggest cavity I've ever seen!"
  The Patient spoke angrily to the dentist ,"You don't have to repeat it."
  "I didn't ,"replied the dentist. "That was an echo."



        回声
  “天啊，像你这么大的洞我还是第一次看到！”牙医在检查一位初诊病人时大声叫道。“这么大的洞我还是第一次看到！”
  病人怒气冲冲的说道：“你没必要说两遍呀！”
“我没有说两遍，那是空洞的回声。”牙医答道。