📚 Year 8 Edexcel Computer Science: Glossary Quick Memory Guide | 八年级爱德思计算机：词汇术语速记指南
Mastering key terminology is the first step to excelling in your Year 8 Edexcel Computer Science course. This guide breaks down essential terms into bite-sized explanations with memory tips to help you recall them quickly. Keep this handy as your revision companion!
掌握关键术语是学好八年级爱德思计算机课程的第一步。这份指南将核心词汇拆解成易于消化的解释，并配上记忆技巧，帮助快速回想。随身携带，让复习事半功倍！
1. Hardware Essentials | 硬件基础
CPU (Central Processing Unit): The 'brain' of the computer that executes instructions. Memory tip: Think of it as the chef in a kitchen who follows recipes.
CPU（中央处理器）：计算机的“大脑”，执行所有指令。记忆方法：把它想象成厨房里按菜谱做菜的主厨。
RAM (Random Access Memory): Volatile memory that temporarily stores data and programs currently in use. Memory tip: RAM is like your desk’s workspace; once you leave, everything is cleared away.
RAM（随机存取存储器）：易失性存储器，临时存放正在使用的数据和程序。记忆方法：就像书桌的工作区，离开后桌面会被清空。
ROM (Read Only Memory): Non-volatile memory that stores essential boot instructions (BIOS/UEFI). Memory tip: ROM is like a recipe book tattooed onto the chef's arm – permanent and unchangeable.
ROM（只读存储器）：非易失性存储器，保存开机必备的指令。记忆方法：像主厨手臂上纹的菜谱，永久不变。
Motherboard: The main circuit board that connects all components. Memory tip: Imagine the motherboard as a city’s road network connecting all buildings.
主板：连接所有部件的主电路板。记忆方法：把主板想象成连接所有建筑的城市道路网。
HDD (Hard Disk Drive): Uses spinning magnetic platters to store data; slower but cheaper per gigabyte. Memory tip: Think of it as a library with slow-moving robots fetching books.
HDD（机械硬盘）：用旋转的磁性盘片存储数据；速度较慢但每GB成本低。记忆方法：想象成图书馆里慢条斯理取书的机器人。
SSD (Solid State Drive): Uses flash memory with no moving parts; much faster and more durable. Memory tip: An SSD is the instant summons of a magician – no waiting.
SSD（固态硬盘）：用闪存，无活动部件；更快更耐用。记忆方法：如同魔术师的瞬间召唤，无需等待。
Input devices: Devices that send data to the computer (e.g. keyboard, mouse). Memory tip: 'Input' = INside putting – you put data IN.
输入设备：将数据送入计算机的设备，如键盘、鼠标。记忆方法：'输入' 就是把数据'送进去'。
Output devices: Devices that present data from the computer (e.g. monitor, speakers). Memory tip: 'Output' = OUT comes – data comes OUT of the computer.
输出设备：把计算机内的数据呈现给用户的设备，如显示器、音箱。记忆方法：'输出' 就是数据从计算机里'跑出来'。
2. Data Representation | 数据表示
Binary: A base-2 number system using only 0 and 1. Memory tip: Bi- means two, like a bicycle has two wheels. All computer data boils down to 0s and 1s.
二进制：仅用0和1的基2计数系统。记忆方法：'bi' 表示二，如同自行车有两个轮子。所有计算机数据最终都是0和1。
Bit: A single binary digit (0 or 1), the smallest unit of data. Memory tip: A bit is a tiny 'bit' of information.
比特/位(b)：一个二进制位（0或1），是最小的数据单位。记忆方法：就像一小“块”信息碎屑。
Byte ly used to store a single character. Memory tip: One byte = one character, like the letter 'A'.
字节(B)：8个比特组成的单位，通常存放一个字符。记忆方法：一字节对应一个字符，比如字母'A'。
Nibble: 4 bits (half a byte). Memory tip: A nibble is a small 'bite' of a byte.
半字节：4个比特（半个字节）。记忆方法：如同从字节上咬了一小口（nibble）。
Kilobyte (KB): Approximately 1000 bytes (or 1024 bytes). Memory tip: One page of plain text is roughly 2 KB.
千字节(KB)：约1000字节（或1024字节）。记忆方法：一页纯文本大约2 KB。
Megabyte (MB): About 1 million bytes. A typical photo is 2–5 MB. Memory tip: Mega- means million.
兆字节(MB)：约100万字节。一张普通照片约2-5 MB。记忆方法：兆（Mega）就是百万。
Gigabyte (GB): About 1 billion bytes. A movie might be 1.5 GB. Memory tip: Giga- is giant – a giant billion!
千兆字节(GB)：约10亿字节。一部电影可能1.5 GB。记忆方法：Giga音似“记卡”，装满巨大数据。
Denary (Decimal): Base-10 number system we use daily (digits 0–9). Memory tip: Deci- means ten, like decade.
十进制：我们日常使用的基10数字系统（数字0-9）。记忆方法：deci-表示十，如十年(decade)。
Hexadecimal: Base-16 system using 0–9 and A–F, often used as shorthand for binary. Memory tip: 'Hex' means six, add the decimal ten to get sixteen. #FF0000 is red.
十六进制：基16系统，使用0-9和A-F，常作为二进制缩写。记忆方法：hex表示六，再加十为十六。#FF0000表示红色。
ASCII: Standard code that represents English characters as numbers. Memory tip: Every key on your keyboard has a secret ASCII number.
ASCII码：将英文字符表示为数字的标准编码。记忆方法：键盘上每个键都有其秘密的ASCII数字。
Unicode: A much larger character set covering all world languages and emojis. Memory tip: Uni- means one code to represent all the world's writing.
Unicode：更大的字符集，涵盖全球语言和表情符号。记忆方法：Uni-表示统一，一套编码表示所有文字。
Pixel: A single dot of colour in a digital image. 'Picture Element'. Memory tip: If you zoom in on a photo, you see the tiny grid squares – each is a pixel.
像素：数字图像中一个颜色点，图像的最小单元。记忆方法：放大照片看到的方格就是像素。
Resolution e.g. 1920 × 1080. Memory tip: Higher resolution = more pixels packed in = sharper picture.
分辨率：图像或显示器的像素数量，如1920×1080。记忆方法：分辨率越高，挤入的像素越多，画面越清晰。
Colour depth: Number of bits used to represent the colour of a single pixel (e.g. 24-bit). Memory tip: More bits per pixel means a larger crayon box.
色深：表示单个像素颜色所用的比特数，如24位。记忆方法：每像素比特数越多，蜡笔盒里的颜色就越多。
3. Programming Fundamentals | 编程基础
Algorithm: A step-by-step set of instructions to solve a problem. Memory tip: Like a recipe for baking a cake – precise and ordered.
算法：解决某个问题的分步指令集。记忆方法：如同烘焙蛋糕的食谱，精确且有序。
Sequence: Instructions executed in order, one after the other. Memory tip: Think of brushing your teeth: pick up brush, add paste, brush, rinse.
顺序：按次序一条接一条执行的指令。记忆方法：就像刷牙的步骤：拿起牙刷、挤牙膏、刷、漱口。
Selection: Deciding which code to run based on a condition (IF...THEN...ELSE). Memory tip: If it rains, take an umbrella; else, wear sunglasses.
选择：根据条件决定运行哪段代码（如果…那么…否则）。记忆方法：如果下雨带伞，否则戴墨镜。
Iteration: Repeating a block of code (loops like FOR, WHILE). Memory tip: Like doing a lap around the track multiple times – again and again.
迭代/循环：重复执行代码块（如FOR、WHILE循环）。记忆方法：像在跑道上跑圈，一圈接一圈。
Variable: A named storage location that holds a value which can change. Memory tip: Like a labelled box where you can swap the contents.
变量：命名的存储空间，存放可以变化的值。记忆方法：像贴了标签的盒子，可以更换里面装的东西。
Constant: A named value that does not change during program execution. Memory tip: Think of a constant like the mathematical Pi (π) – always the same.
常量：程序执行期间值不变的命名数据。记忆方法：像数学中的π，永恒不变。
Data type: Defines what kind of data a variable holds (integer, string, Boolean). Memory tip: It's like describing the type of container – a box for numbers or a box for words.
数据类型：定义变量存放的数据种类。记忆方法：就像标明容器类型：数字箱还是文字箱。
Integer: A whole number, positive or negative, without a decimal. Memory tip: 'Integer' means 'whole' in Latin – intact, no fragments.
整型：不含小数点的整数，可正可负。记忆方法：整数就是完整的数，没有零碎。
String: A sequence of characters, e.g. 'Hello123'. Often in quotes. Memory tip: String of letters like beads on a thread.
字符串：一串字符序列，如'Hello123'，通常带引号。记忆方法：像串在线上的珠子。
Boolean: A data type with only two possible values: TRUE or FALSE. Memory tip: Named after George Boole; think of a light switch – on (true) or off (false).
布尔型：仅有两种值的数据类型：真或假。记忆方法：像电灯开关，开（真）或关（假）。
Float: A number with a decimal point, e.g. 3.14. Memory tip: The decimal point 'floats' around the digits.
浮点型：带小数点的数字，如3.14。记忆方法：小数点可以在数字间“浮动”。
Input: Data received by the program from the user or a sensor. Memory tip: Asking a question and waiting for the answer.
输入：程序从用户或传感器接收数据。记忆方法：像问问题后等待回答。
Output: Data sent by the program to the user (screen, speaker). Memory tip: The program’s way of talking back to you.
输出：程序向用户发送数据（显示、声音）。记忆方法：程序向你回话的方式。
Assignment: Setting a variable to a value, e.g. score = 0. Memory tip: 'Assign' just means you give a value to the label.
赋值：把值赋予变量，如score = 0。记忆方法：给标签指定存放的东西。
Operator: Symbols that perform operations, e.g. +, -, *, /, MOD (remainder), DIV (integer division). Memory tip: Think of them as action verbs in a math sentence.
运算符：执行操作的符号，如+、-、*、/、MOD（取余）、DIV（整除）。记忆方法：好比数学语句中的动作词。
Comment: Non-executed text in code that explains what it does. Memory tip: Sticky notes left for your future self or teammates.
注释：代码中不执行的说明文字。记忆方法：留给未来自己或队友的便利贴。
Debugging: The process of finding and fixing errors in code. Memory tip: Removing 'bugs' – early computers attracted actual moths!
调试：找到并修复代码错误的过程。记忆方法：捉“虫”——早期计算机真的会引飞蛾短路！
4. Networks and the Internet | 网络与互联网
Network: Two or more computers connected together to share resources. Memory tip: Like a group chat – sharing messages and files.
网络：两台或以上计算机连接在一起共享资源。记忆方法：像群聊一样共享消息和文件。
LAN (Local Area Network): A network over a small geographical area, like a school or home. Memory tip: LAN sounds like 'local'; covers your local area.
LAN（局域网）：覆盖较小地理范围的网络，如学校或家庭。记忆方法：LAN听起来像“local”，覆盖本地。
WAN (Wide Area Network): A network covering a large area, e.g. the internet. Memory tip: WAN sounds like 'wan' (wide) – spans far distances.
WAN（广域网）：覆盖大面积区域的网络，如互联网。记忆方法：WAN 音似“万”，覆盖万水千山。
Internet: The global network of interconnected networks. Memory tip: 'Inter' + 'net' = a network between networks.
互联网：全球互联的网络之网络。记忆方法：“inter”是相互，“net”是网，网与网相连。
World Wide Web: The collection of webpages accessible via the internet. Memory tip: The web is only part of the internet, like a theme park is part of a city.
万维网(WWW)：可通过互联网访问的网页集合。记忆方法：万维网只是互联网的一部分，如游乐园是城市的一部分。
IP Address: A unique numerical label assigned to each device on a network, e.g. 192.168.1.1. Memory tip: Your device’s postal address on the internet.
IP地址：网络中每台设备的唯一数字标签，如192.168.1.1。记忆方法：好比设备在互联网上的门牌号。
MAC Address: A hardware-unique identifier assigned to a network interface card. Memory tip: Think of it as the unchangeable fingerprint of your device’s network chip.
MAC地址：分配给网卡的硬件唯一标识符。记忆方法：如同设备网卡的不可变指纹。
Protocol: A set of rules that allows devices to communicate. HTTP, TCP/IP are examples. Memory tip: Protocol is the 'etiquette' for machines talking politely.
协议：允许设备通信的一套规则。记忆方法：协议就是机器之间礼貌交谈的“礼仪”。
HTTP/HTTPS Text Transfer Protocol (Secure) for transferring web pages. S means encrypted. Memory tip: 'S' = Secure; look for the padlock icon.
HTTP/HTTPS：超文本传输协议（安全版），用于传输网页。S代表加密。记忆方法：S=安全，留意浏览器锁头图标。
DNS (Domain Name System): Translates human-friendly domain names (e.g. google.com) into IP addresses. Memory tip: Like a phonebook that matches names to numbers.
DNS（域名系统）：将人类友好的域名（如google.com）翻译成IP地址。记忆方法：像电话簿，把名字转换为号码。
Router: A device that forwards data packets between networks. Memory tip: The postal sorting office that reads addresses and sends packages the right way.
路由器：在不同网络之间转发数据包的设备。记忆方法：像邮局分拣处，读取地址并把包裹送到正确方向。
Switch: Connects devices within the same network and directs data to the correct device. Memory tip: An intelligent traffic cop inside a LAN, sending messages only where needed.
交换机：在同一网络中连接设备，并将数据定向给正确设备。记忆方法：局域网内的智能交通警察，只把消息发给目的地。
Modem: Modulator-demodulator that converts digital signals to analogue and back (for phone lines). Memory tip: 'Mo' for modulate, 'Dem' for demodulate – translates languages.
调制解调器：把数字信号和模拟信号相互转换的设备。记忆方法：像翻译官，把电脑的数字语换成电话线的模拟语。
Client-server: A network model where clients request services and a central server provides them. Memory tip: Restaurant: you (client) order from the waiter (server) who fetches from the kitchen.
客户端-服务器：客户端请求服务，中央服务器提供服务的网络模型。记忆方法：像餐馆：你（客户端）向服务员（服务器）点菜，服务员从厨房取餐。
Peer-to-peer: All computers share resources directly without a central server. Memory tip: Everyone brings snacks to share equally; no single provider.
对等网络：所有计算机直接共享资源，无中央服务器。记忆方法：像每人带零食来分享，没有单一提供者。
Cloud computing: Storing and accessing data and programs over the internet instead of your local hard drive. Memory tip: Your files live on remote 'cloud' servers you access from anywhere.
云计算：通过互联网而非本地硬盘存储和访问数据与程序。记忆方法：你的文件住在远端的“云”服务器上，随处可取。
5. Cybersecurity | 网络安全
Malware: Malicious software designed to harm or exploit devices. Malicious + Software. Memory tip: Think of a digital disease.
恶意软件：设计用于损害或利用设备的恶意软件。记忆方法：把它看作数字世界的病毒。
Virus: Malware that attaches itself to clean files and spreads when those files are shared. Memory tip: Like a biological virus, it needs a host to spread.
病毒：附着在干净文件上，当文件共享时传播的恶意软件。记忆方法：就像生物病毒，需要宿主传播。
Worm: Malware that replicates itself and spreads without needing a host file. Memory tip: It wriggles through network holes on its own.
蠕虫：无需宿主文件即可自我复制和传播的恶意软件。记忆方法：像虫子一样自己蠕动钻过网络漏洞。
Trojan horse: Malware disguised as legitimate software. Memory tip: Named after the Greek myth – looks like a gift but contains enemies.
木马：伪装成合法软件的恶意软件。记忆方法：源于希腊神话，看上去是礼物，里面藏着敌军。
Phishing: Fraudulent emails or messages tricking users into revealing personal information. Memory tip: Spelled 'ph' like fishing – baiting for victims.
钓鱼攻击：欺诈性的邮件或消息，诱骗用户透露个人信息。记忆方法：ph发音像fish，钓鱼式引诱。
Firewall: A security system that monitors and controls incoming/outgoing network traffic. Memory tip: A digital barrier wall that blocks fire (attacks).
防火墙：监控并控制进出流量的安全系统。记忆方法：像一堵数字化防火墙，阻挡火势般的攻击。
Encryption: Scrambling data so only authorised parties with a key can read it. Memory tip: Turning your message into secret code, with a decoder key.
加密：将数据加乱，只有持密钥的授权方才能读取。记忆方法：把消息变成密码，必须有解码钥匙。
Password: A secret combination used to authenticate a user. Memory tip: Like the secret knock on a clubhouse door – only those who know it can enter.
密码：用于验证用户身份的机密组合。记忆方法：像会所的秘密敲门暗号，只有知道的人才能进入。
Biometric: Using unique physical characteristics for identification (fingerprint, face). Memory tip: 'Bio' life + 'metric' measure – measuring life features.
生物识别：使用独有的身体特征进行身份识别（指纹、人脸）。记忆方法：测量生物独特特征。
Backup: A copy of data kept separately to restore if originals are lost. Memory tip: Always have a spare key – backup your data regularly!
备份：分开保存的数据副本，以便在原数据丢失后恢复。记忆方法：总要留一把备用钥匙——定期备份！
Social engineering: Manipulating people into giving up confidential information, e.g. pretending to be IT support. Memory tip: The human side of hacking – tricking, not cracking.
社会工程：诱骗人们交出机密信息，比如冒充IT支持。记忆方法：黑客的人心操控术，欺骗而非技术破解。
Hacking: Illegally gaining access to a computer system. Memory tip: Breaking into a digital house without permission.
黑客攻击：非法侵入计算机系统。记忆方法：未经许可闯入数字房屋。
6. Algorithms and Computational Thinking | 算法与计算思维
Decomposition: Breaking a complex problem into smaller, manageable parts. Memory tip: Like solving a big jigsaw puzzle by sorting the edge pieces first.
分解：把复杂问题拆分成更小、可处理的部分。记忆方法：像处理大拼图，先挑出边缘块。
Pattern recognition: Identifying similarities or patterns among problems. Memory tip: Noticing that level 3 of a game uses the same enemy movement as level 1.
模式识别：找出问题之间的相似性或模式。记忆方法：发现游戏第3关和第1关的敌人移动套路一样。
Abstraction: Removing unnecessary details to focus on what is important. Memory tip: Drawing a stick figure map – you don't need every tree, only the route.
抽象：剔除不需要的细节，聚焦重要部分。记忆方法：画简笔地图——你不需要每棵树，只要路线。
Flowchart: A diagram that represents an algorithm using standard symbols (ovals, arrows, diamonds). Memory tip: Follow the arrows to see the flow of logic.
流程图：用标准符号表示算法的图。记忆方法：跟着箭头走，看清逻辑流向。
Pseudocode: A simplified way of writing algorithms using plain English, not specific programming language syntax. Memory tip: Fake code that humans can easily read before coding.
伪代码：用简明英语写算法的方式，不遵循特定编程语言语法。记忆方法：写代码前给人类看的“假”代码。
Trace table: A table that tracks the values of variables as an algorithm runs. Memory tip: Like a diary for each variable, noting how its value changes step by step.
跟踪表：随着算法运行跟踪变量值的表格。记忆方法：如变量的日记，记录每一步值的改变。
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