朝阳网站建设 高碑店,免费游戏直接能玩,做实体识别的网站,陕西seo优化计算机专业英语(霍洪涛)课件Chapter 4谢谢 * Chapter 4 Operating System Review 前驱#xff0c;前任 后继#xff0c;继任 常见的 足够的 有时#xff1b;在某种情况下 不局限于 目录#xff0c;存货清单 支付、支出 伪码 * predecessor successor commonplace not limit…计算机专业英语(霍洪涛)课件Chapter 4谢谢 * Chapter 4 Operating System Review 前驱前任 后继继任 常见的 足够的 有时在某种情况下 不局限于 目录存货清单 支付、支出 伪码 * predecessor successor commonplace not limited to inventory disburse pseudocode under certain circumstance sufficient Unit 1 Operating System Structure Writing programs that keep track of all these components and use them correctly, let alone optimally, is an extremely difficult job.(P68P2L4) 写一个能跟踪所有组成部分、正确地使用它们的程序是一项极其困难的工作更不用说对其进行优化了。 句子分析: 主干 从句 keep track of 跟踪 let alone 更不用说/不干涉不打扰不管 Let him alone. He needs a rest. 别去打扰他他需要休息一下。 * Writing programs is an extremely difficult job. … programs that keep track of … Unit 1 Operating System Structure lump(P68L1) n. 块肿块 a lump of… 一块。。。 I noticed a lump in her skin. 我注意到她皮肤上有个肿块 a lump in the throat 如鲠在喉 earn its keep(P68L3) In each case, retailers will carry only content that can generate sufficient demand to earn its keep.在这些行业里商家的进货必须要保证有足够的销量才能勉强为生。 * 勉强为生 The Structure of A Computer System Unit 1 Operating System Structure * Unit 1 Operating System Structure At the bottom is the hardware, which in many cases is itself composed of two or more layers. The lowest layer contains physical devices(p68RP2L1). 在最下面的是硬件很多情况下都是由两个以上层次组成。最底层含有物理设备。 Next comes a layer of primitive software, called microprogram, that directly controls these devices and provides a cleaner interface to the next layer(p68RP1L1). 接下来的一层是简单的软件叫做微程序用来直接控制设备并且为下一层提供更为干净的界面。 * Unit 1 Operating System Structure In machine language layer, the input/output devices are controlled by loading values into special device registers(p69P1L2). 在机器语言层输入/输出设备被控制着把值放入到特殊的设备寄存器中。 A major function of the operating system is to hide all this complexity and give the programmer a more convenient set of instructions to work with(p69P2L1). 操作系统的重要功能就是隐藏所有这些复杂的事物给程序员使用一组更方便的指令工作。 * Unit 1 Operating System Structure On the top of the operating system is the rest of the system software(p69RP1L1).
