先看2个段子。段子一:一用户新购买的“国Ⅲ”机器无法启动,电话叫来了维修工程师,检查了一通,工程师满身是汗,还是没找到故障。用户急了开始对工程师不满,工程师停下手,抹掉脸上豆大的汗珠子说道:“您也别着急,您这只是打不着火,你知道有多少发动机着火烧掉的吗?” Look at the two paragraphs. A segment: a user newly purchased “Country III ” machine can not start, the phone called a maintenance engineer, check a pass, engineers covered with sweat, or did not find the fault. User anxious began to dissatisfied with the engineer, the engineer stopped his hand, wipe his face big sweat beads, said: “You do not worry, you just can not hit the fire, you know how many engines burn it?”