The superior computer system is an ordinary PC which discerns the validation of tickets hard card and IC card . It also realizes such functions as uploading data downloading data recovering data and displaying data.
上位机为普通的PC机，主要实现纸票、硬纸卡(简称硬卡)及射频IC卡(简称IC卡)信息的合法性识别，以及数据上传、数据下载、数据恢复和数据显示等功能。
参考来源 - 门控检票系统几项关键技术的研究及实现·2,447,543篇论文数据，部分数据来源于NoteExpress
The fourth chapter simply introduces hard disk knowledge and general method of data recovering.
第四章简单介绍了硬盘存储器的知识，并对数据恢复的一般方法进行阐述。
Even with a plentiful supply of working computers to read hard drives, recovering data would not be easy.
即便有大量的计算机可以读取硬盘驱动器，恢复这些数据也不是轻而易举之事。
It is planning to release a deluge of data on matters ranging from school exams to the time spent in hospital by patients recovering from surgery.
他们正计划公布海量数据，其范围涵盖了从考试成绩到手术病人康复所用的时间。
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