孩提时,我拉着妈妈的手高高兴兴地去火车站乘火车.好不容易等到火车来了,好奇心促使我靠近铁轨去看那宠然大物.可是妈妈总使劲地把我拽回到那红红的警戒线内,并告诉我:不能靠近,要被“吸入”的!我曾经强烈地想知道;为什么?这究竟是为什么! When I was a child, I took my mother’s hand and happily went to the train station to take the train. It wasn’t easy until the train arrived. Curiosity prompted me to walk near the rails to see the big things. But my mother always slammed me back to me. In the red cordon, and told me: can not be close, to be “inhaled”! I once strongly wanted to know; why? This is exactly why!