📚 AS Edexcel Computer Science: Vocabulary Quick-Memorisation Guide | AS Edexcel 计算机：词汇术语速记指南
Mastering the technical vocabulary of AS Edexcel Computer Science can feel like learning a new language. This guide breaks down essential terms into digestible chunks and provides memory hints so you can recall them quickly under exam pressure. For each term, read the English definition along with the memory tip, then review the Chinese explanation to reinforce your understanding. Let's turn abstract jargon into vivid mental images.
掌握 AS Edexcel 计算机科学的技术词汇就像学习一门新语言。本指南将关键术语拆解为易于消化的小块，并提供记忆提示，帮助你在考试压力下快速回想。每个术语先呈现英文定义和记忆技巧，再阅读中文解释以加深理解。让我们一起把抽象的术语变成生动的意象吧。
1. Programming Basics: Sequence, Selection, Iteration | 编程基础：顺序、选择、迭代
Sequence – The execution of statements in a linear order, exactly as they appear in the code. Memory hint: Think of a cooking recipe; you cannot frost the cake before you bake it.
顺序 – 按代码出现的线性顺序逐条执行语句。记忆技巧：想一想烹饪食谱；你不可能在烤蛋糕之前就先抹糖霜。
Selection – A decision-making construct that executes different code paths based on a condition (e.g., IF...THEN...ELSE). Memory hint: A fork in the road – you choose one branch depending on the signpost (condition).
选择 – 一种决策结构，根据条件执行不同的代码分支（如 IF...THEN...ELSE）。记忆技巧：岔路口——根据路标（条件）选择一条分支。
Iteration – Repeating a block of code while a condition holds true (WHILE) or for a set number of times (FOR). Memory hint: Like a playlist on repeat – the same songs loop until you press stop.
迭代 – 当条件为真时重复执行一段代码（WHILE），或者按固定次数重复（FOR）。记忆技巧：如同循环播放的歌单——相同的歌曲不断重复直到你按下停止。
2. Data Types and Operators | 数据类型与运算符
Integer – A whole number without a fractional part, positive or negative. Memory hint: 'Integer' contains 'intact' – a number that is whole and unbroken.
整型 – 没有小数部分的正或负的整数。记忆技巧：Integer 含有 'intact'（完整），暗示数字是完整的、未分割的。
String – A sequence of alphanumeric characters or symbols, often enclosed in quotes. Memory hint: Like a string of beads, each character is a bead threaded together.
字符串 – 一系列字母数字字符或符号，通常用引号括起。记忆技巧：就像一串珠子，每个字符是一颗珠子串连在一起。
Boolean – A data type with only two possible values: TRUE or FALSE. Memory hint: Named after George Boole. Imagine a light switch – it can only be ON or OFF.
布尔型 – 只有两个可能值的数据类型：TRUE 或 FALSE。记忆技巧：以乔治·布尔命名。想象一个电灯开关——它只能是开或关。
3. Data Structures: Arrays, Records, Files | 数据结构：数组、记录、文件
Array – A collection of data items of the same data type, stored under one identifier and accessed by index. Memory hint: An egg carton – identical compartments, each holding one egg, reached by position number.
数组 – 一组相同数据类型的元素集合，存储在一个标识符下并通过索引访问。记忆技巧：鸡蛋盒——相同的格子，每个格子放一个蛋，用位置编号来取用。
Record – A data structure that can hold multiple fields of different data types, analogous to a row in a database table. Memory hint: A student record card holding name (string), age (integer), and enrolled (Boolean) all in one place.
记录 – 一种可以包含多个不同数据类型字段的数据结构，类似于数据库表中的一行。记忆技巧：一张学生记录卡，同时包含姓名（字符串）、年龄（整型）和是否注册（布尔型）。
File – A named collection of data stored on a secondary storage device. Memory hint: Like a physical folder in a filing cabinet, labelled and containing information.
文件 – 存储在辅助存储设备上的命名数据集合。记忆技巧：如同文件柜里贴有标签的文件夹，里面装满了信息。
4. Algorithms and Efficiency: Searching and Sorting | 算法与效率：搜索与排序
Linear search – Checks each element in turn until the target is found or the list ends. Memory hint: Flipping pages of a book one by one to find a phone number.
线性搜索 – 逐个检查每个元素直到找到目标或列表结束。记忆技巧：一页一页翻电话簿找号码。
Binary search – Repeatedly divides a sorted list in half, discarding the half that cannot contain the target. Memory hint: Guessing a number between 1 and 100 by always asking “Is it greater than 50?” then half again.
二分搜索 – 反复将已排序列表分为两半，丢弃不可能包含目标的一半。记忆技巧：猜1到100之间的数字，总是问“大于50吗？”，然后继续折半猜测。
Bubble sort – Passes through the list repeatedly, comparing adjacent items and swapping them if they are in the wrong order. Memory hint: Bubbles rising to the surface – the largest element 'bubbles up' to the end of each pass.
冒泡排序 – 反复遍历列表，比较相邻元素并在顺序错误时交换。记忆技巧：气泡浮上水面——最大的元素在每一趟遍历中“冒”到末尾。
5. Computer Architecture: CPU and the Fetch-Decode-Execute Cycle | 计算机体系结构：CPU与取指-译码-执行周期
Central Processing Unit (CPU) – The 'brain' of the computer that carries out program instructions. Memory hint: Like a chef in a kitchen following a recipe – the CPU reads, interprets, and acts on instructions.
中央处理器 (CPU) – 计算机的“大脑”，执行程序指令。记忆技巧：像厨房里遵循菜谱的主厨——CPU 读取、理解并执行指令。
Arithmetic Logic Unit (ALU) – A component of the CPU that performs arithmetic and logical operations. Memory hint: ALU sounds like 'alumnus' who is good at maths and logic puzzles.
算术逻辑单元 (ALU) – CPU 的一个部件，执行算术和逻辑运算。记忆技巧：ALU 谐音 'alumnus'（校友），这位校友擅长数学和逻辑谜题。
Fetch-Decode-Execute Cycle – The fundamental operating cycle of a CPU: fetch an instruction from memory, decode it to determine what action is required, and execute that action. Memory hint: FDE – like ordering food: Fetch the menu (instruction), Decode the dish name (understand), Execute by cooking (perform).
取指-译码-执行周期 – CPU 的基本操作循环：从内存中取出一条指令，译码以确定所需操作，然后执行该操作。记忆技巧：FDE——就像点餐：取菜单（指令），译码菜名（理解），执行烹饪（完成）。
6. Memory and Storage Technologies | 存储器与存储技术
Random Access Memory (RAM) – Volatile, fast memory that holds data and instructions currently in use; contents are lost when power is turned off. Memory hint: RAM is like a whiteboard – you can write and erase quickly, but everything disappears if you leave the room (power off).
随机存取存储器 (RAM) – 易失性、快速存储器，存放当前正在使用的数据和指令；断电后内容丢失。记忆技巧：RAM 就像白板——可以快速写擦，但一旦离开房间（断电），所有内容消失。
Read-Only Memory (ROM) – Non-volatile memory that stores start-up instructions (BIOS); retains data without power. Memory hint: ROM is a stone tablet – the instructions are carved permanently.
只读存储器 (ROM) – 非易失性存储器，保存启动指令（BIOS）；断电后数据依然保留。记忆技巧：ROM 是刻字的石板——指令永久镌刻。
Cache – Extremely fast, small-capacity memory located close to the CPU, storing frequently used data to reduce access time. Memory hint: A chef's apron pocket holding the most-used spices, saving trips to the pantry.
高速缓存 (Cache) – 位于 CPU 附近的极快速、小容量存储器，存放常用数据以减少访问时间。记忆技巧：厨师围裙口袋里装着最常用的调料，省去跑去储藏室的麻烦。
7. Data Representation: Binary, Hexadecimal, Two's Complement | 数据表示：二进制、十六进制、补码
Binary – A base‑2 number system using only the digits 0 and 1. Memory hint: 'Bi' means two – think of a bicycle with two wheels, or two states: on/off.
二进制 – 以 2 为基数的数字系统，只使用数字 0 和 1。记忆技巧：'Bi' 表示二——想想两个轮子的自行车，或两种状态：开/关。
Hexadecimal – A base‑16 system using digits 0‑9 and letters A‑F (representing values 10‑15). Memory hint: 'Hexa' = six, 'decimal' = ten; together 6+10=16. One hex digit packs four binary digits.
十六进制 – 以 16 为基数的数字系统，使用数字 0‑9 和字母 A‑F（代表值 10‑15）。记忆技巧：'Hexa' 六 + 'decimal' 十 = 十六。一个十六进制数字可容纳四个二进制位。
Two's complement – A method for representing negative integers in binary; invert all bits and add 1. Memory hint: To flip a sign, flip the bits then plus one – like turning a photo negative and adjusting.
二进制补码 – 一种用二进制表示负整数的方法：将所有位取反后加 1。记忆技巧：改变正负号，反转位再加一，就像颠倒照片底片再做微调。
8. Networking Fundamentals: LAN, WAN, Protocols | 网络基础：局域网、广域网、协议
Local Area Network (LAN) – Connects computers over a small geographic area, such as a school or office. Memory hint: 'Local' as in local neighbourhood – devices are physically close, often sharing a switch.
局域网 (LAN) – 连接小地理范围内的计算机，如学校或办公室。记忆技巧：'Local' 就像本地社区——设备物理上靠近，常共用交换机。
Wide Area Network (WAN) – Connects computers over a large geographic area, using leased lines or the internet. Memory hint: WAN rhymes with 'span' – it spans the wide world, connecting cities.
广域网 (WAN) – 连接大范围的计算机，使用租用线路或互联网。记忆技巧：WAN 与 'span'（跨越）押韵——它跨越广阔世界，连接城市。
Protocol – A set of rules governing how data is transmitted and received across a network (e.g., TCP/IP). Memory hint: Think of diplomatic protocol that dictates formal handshakes; networking protocols dictate the digital handshake.
协议 – 管理数据如何在网络上传输和接收的一套规则（如 TCP/IP）。记忆技巧：就像外交礼仪规定正式的握手方式，网络协议规定数字握手的方式。
9. System Software: Operating Systems and Translators | 系统软件：操作系统与翻译器
Operating System (OS) – Software that manages hardware resources, provides a user interface, and allows applications to run. Memory hint: The OS is the stage manager of a theatre – handling lighting (hardware), giving actors (apps) their cues, and presenting the show to the audience (user).
操作系统 (OS) – 管理硬件资源、提供用户界面并允许应用程序运行的软件。记忆技巧：OS 就像剧场的舞台监督——管理灯光（硬件），给演员（应用）提示，并向观众（用户）呈现演出。
Compiler – A translator that converts the entire source code into machine code in one go, producing an executable file. Memory hint: A novel translator who rewrites a whole book into another language overnight, then hands you the printed copy.
编译器 – 一次性将全部源代码转换为机器码并生成可执行文件的翻译器。记忆技巧：像一位翻译家整夜把一本小说翻译成另一种语言，然后交给你打印好的版本。
Interpreter – A translator that reads and executes source code line by line, without producing a standalone executable. Memory hint: A live interpreter at a meeting, translating each sentence as it is spoken, but never writing a full translated book.
解释器 – 逐行读取并执行源代码的翻译器，不生成独立的可执行文件。记忆技巧：像会议上的同声传译，每一句说完即刻翻译，但从来不会汇编成一本完整的翻译书。
10. Ethical, Legal and Environmental Issues | 伦理、法律与环境议题
Data Protection Act – UK law governing the processing of personal data, ensuring it is used fairly, lawfully, and kept secure. Memory hint: The Data 'Guardian' protecting your personal information from misuse.
数据保护法 – 英国法律，规范个人数据的处理，确保数据被公平、合法地使用并安全保存。记忆技巧：数据“卫士”保护你的个人信息免遭滥用。
Computer Misuse Act – UK law that criminalises unauthorised access to computer systems and data, including hacking and virus distribution. Memory hint: 'Misuse' means mis-use – think of breaking into a digital house without permission.
计算机滥用法 – 英国法律，将未经授权访问计算机系统和数据（包括黑客攻击和散布病毒）定为犯罪。记忆技巧：'Misuse' 意为滥用——想象擅自闯入一间数字房屋。
Open source software – Software whose source code is freely available for anyone to inspect, modify, and distribute. Memory hint: A recipe that is published online for everyone to tweak – you can add your own spice, but must share the improved recipe.
开源软件 – 源代码免费公开，任何人都可以查看、修改和分发的软件。记忆技巧：一份发布在网上任由大家调整的菜谱——你可以加入自己的调料，但必须分享改良后的菜谱。
Published by TutorHao | Computer Science Revision Series | aleveler.com
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