Outfitting every POS solution in store with a scanner, printer, display, magnetic stripe reader (MSR), and payment device would be too expensive.

为店内的每个POS解决方案配备扫描仪、打印机、显示器、磁条阅读器(magnetic stripe reader,MSR)和付款设备的成本太昂贵了。

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Under the covers, the code configures the simulator for the disk (where it loads the LISP interpreter), the card reader (where it reads the job), and the printer (where it emits the output).

在后台，代码为磁盘（在这里加载LISP翻译器）、读卡器（在这里读取作业）以及打印机（在这里产生输出）配置仿真器。

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But what if the slow card reader and printer were replaced by a disk?

如果慢速的读卡机和打印机由磁盘来代替又会怎样呢？

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But what if the slow card reader and printer were replaced by a disk?

如果慢速的读卡机和打印机由磁盘来代替又会怎样呢？

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