亲爱的同学们,随着国民经济的快速发展,我国的铁路建设发生着日新月异的变化:铁路电器化、高速化、重载化、封闭化……铁路在为国人创造巨大财富的同时,也给沿线居民的生活带来了一些不便。比如,铁路采取了封闭化管理,沿线居民不能到铁路旁放牧,不能随便跨越铁路,同学们不能到铁路边玩耍嬉戏。这都是为 Dear students, with the rapid development of the national economy, the railway construction in our country changes rapidly with each passing day: the railway is electrified, high-speed, heavy-handed and closed. The railway, while creating great wealth for the people, People living along the area brought some inconvenience. For example, the railway has taken a closed administration. Residents along the railway line can not graze alongside the railway, can not easily cross the railway, and students can not play and play to the railway. This is for