我们80年代去上海读大学，主要乘火车，车厢外表是绿色的，所以也叫绿皮火车。当时还没有高铁和动车，火车分为慢车、普快和特快，成都到上海只有两趟普快，分别走宝成线和陇海线，用时48小时和51小时。
现在，成都到上海有11趟车，两趟快车，5趟高铁，4趟动车，快车通过提速现在约需要28小时，而高铁和动车基本只要12小时左右。无论是火车运行的数量增加还是用时的减少，都让我们真切地看到社会的快速发展和技术的进步，不禁油然而生满满的幸福感。
We went to Shanghai to study in the 1980s, mainly by train, which is green in appearance, so it is also called green train. There was no high-speed railway and EMU at that time. The train was divided into local, standard express and express trains. Chengdu had only two express trains to Shanghai, taking the Baocheng line and the Longhai line, respectively, taking 48 hours and 51 hours.
Chengdu now has 11 trains to Shanghai, two express trains, 5 high-speed trains, and 4 EMUs. Express speeding now takes about 28 hours, while high-speed rail and EMUs are basically only about 12 hours. Whether it's the increase or decrease in the number of trains, we can really see the rapid development of society and the progress of technology, and we can't help but be full of happiness.
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