"i had an operation," said a man to his friend, "and the doctor left a sponge in me."一个男人对他的朋友说：“我动了一次手术，手术后医生把一块海绵忘在我的身体里了。” "that's terrible!" said the friend. "got any pain?" “真是太糟糕了！”朋友说道：“你觉得疼吗？” "no, but i am always thirsty!" “不疼，可是我总感到口渴！”