计算机专业英语教程 教学课件 作者桑莉君 unit03.ppt

UNIT 3Operating Systems COMPETENCIES After you have read this unit, you should be able to: Define operating systems. Describe the basic functions of operating systems. List the history of operating systems. Describe a particular operating system: Windows XP. Describe how does the operating system manage? Text A Operating Systems Concept Check What are the two main functions of an operating system? Why we say the operating system work as an extended machine? Why we say the operating system work as a resource manager? In which kind of language does operating systems programming? How many kind of multiplexing (sharing) resources are there in resource management? What are they? New Words and Phrases pin n. 固定、钉住 pin sth. down 明确说明，此处当下定义讲 perform v. 做，执行，施行 mention v. 写到、说到、提到 architecture n. 建筑学,系统,大型组织 instruction n. 命令，指令 instruction set 计算机上的指令集合 organization n. 组织，结构，系统 New Words and Phrases structure n. 结构,构造 primitive adj. 原始的,简陋的 awkward adj. 别扭的，不熟练的,笨拙的 intimate adj. 亲密的,详尽的 involved adj. 复杂的；有关联的 involved with 与…有关联的 abstraction n. 除掉，提取 deal with 处理问题、任务等 New Words and Phrases truth about　关于…的真相 shield sb. from sth. 保护某人不受…伤害 orient adj. 进行引导兴趣瞄准,趋向于 oriented 朝某方向的 file-oriented interface 面向文件的接口 interrupts v.暂时中断 conceal v. 隐藏，掩盖，隐瞒 underlyine adj. 位于…之下 equivalent adj. 相同的 virtual adj. 事实上的，实际上的 New Words and Phrases to summarize it in a nutshell 用很少的言语（说明某事物），简而言之 providing sb. with 将…提供给某人 top-down 从头至尾，完全 instead of 代替，而不是 taking turns 轮流做某事 convenient adj. 方便的，合适的 execution n. 执行，完成 manufacturer n. 制造，产品 New Words and Phrases sophistication n. 复杂性 associated with 和…有关系 recovery n. 找回，复原 sequence n. 顺序 priority n. 居要位 respond v.回答，回应 assess v. 评价，评定 batch n. 一批 New Words and Phrases overlap v. 重叠，交叠 resident n. 定居，居民 pool n. v. 水池，水塘 unavailable adj. 无法得到，难以获得 deny v. 否定，阻止 coordinate v. 使协调，使相配合 facility n. 设备，辅助物 referred to 涉及，提到，有关 take advantage of 利用，使转为有利 Notes 1.As mentioned ea