傍晚,在公园里散步时,忽然天空中传来轰隆隆的雷声,乌云并没有密布天空,那雷声也略显遥远。显然,这样的雷声并没有多少影响力,除了吸引公园的人们抬头仰望之外,并没有催生人们急于回家的心情。正在这时,我听到了一个稚嫩的声音:“爸爸,爸爸,天上为什么会打雷呢?”这是一位四五岁的小女孩,头扎两条马尾辫,正惊奇地问爸爸。她的爸爸解释道:“这雷电呀,在天上互相摩擦,于是产生了电荷,有的带上了正电,有的带上 In the evening, when walking in the park, there suddenly came a thundering thunder in the sky, the clouds were not covered in sky, and the thunder was slightly distant. Obviously, such a thunder does not have much influence, except that those who attract the park looked up, and did not prompt people anxious to go home. Just then, I heard a tender voice: ”Father, father, why the sky thunder?“ This is a four or five year old girl with two ponytails, was surprised to ask Dad. Her dad explains: ”This thunderbolt, rubbing against each other in the sky, so it produces a charge, some is positively charged, and some is taken