“I'm sorry ,Madam ,but I shall have to charge you twenty dollars for pulling your boy's tooth .” “Twenty d ollars!Why ,I understand you to say that you charged only four dollars for such work!” “Yes ,but this youngster yelled so terribly that he scared four other patients out of the office .” “對(duì)不起,夫人,為您孩子拔牙我要收取20美元.” “20美元!為什么?不是說(shuō)好只要4美元.” “是的,但是你的孩子大喊大叫,把另外四個(gè)病人嚇跑了.” TWO：Teacher：We all know that beat causes an object to expand an cold cauese it to contract.Now,can anyone give me a good example?John：Well ,in the summer the days are long,and in the winter the days are short.老師：我們都知道熱脹冷縮的道理.現(xiàn)在,誰(shuí)給我舉個(gè)例子?約翰：嗯,在夏天天都長(zhǎng),在冬天天都短.