求翻译：我印象最深的一次旅行是去内蒙古阿尔山。阿尔山是一座雪山，海拔4000多。我们是从北京开车去的，经过2天的奔波，最终我们到达了目的地。历时7小时，最终登上阿尔山的草甸。最后我们骑马下山，用了2小时到达山脚。是什么意思？

My most memorable trip was to arxan in Inner Mongolia. Arshan is a snowy mountain, elevation more than 4,000. We are to drive from Beijing, after rushing for 2 days, we finally reached our destination. During the 7-hour, eventually boarded aershan meadow. Finally we rode down the Hill, took 2 hours to reach the foot of the mountain.