该打印装置 还装设有底座、送纸单元及打印单元，该底座具有开口。

The printing device is also provided with a base, a sheet-feeding unit and a printing unit; and the base is provided with an opening.

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二次仪表包括以单片机为核心的测量控制单元、显示单元、打印单元和超阈值报警单元等部分。

The secondary-instrument is actually a micro-controller system, which consists of a single-chip micro-controller cored measure-controlling unit, display unit, printing unit and alarming unit.

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这个子系统通常存在于打印系统的控制单元中（单个地区）。

This subsystem normally resides in the printing system's control unit (a single locality).

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Let's check it out. I've written a little bit of a test script here, so if we test cell sort, and I've written this so that it's going to print out what the list is at the end of each round, OK.

我们来检查检查，我写了一个小测试脚本,我写这个脚本来测试单元排序，它能够打印出每一轮结束后,链表的是什么样子的。

麻省理工公开课 - 计算机科学及编程导论课程节选