📚 GCSE CCEA Engineering: Vocabulary & Terminology Quick-Reference Guide | GCSE CCEA 工程：词汇术语速记指南
Mastering key terminology is essential for success in GCSE CCEA Engineering. This quick-reference guide compiles the most important vocabulary across core topics, from materials and mechanics to electronics and systems. Each term is paired with a concise definition and its Chinese equivalent to aid memorisation and bilingual understanding. Use this guide regularly to reinforce your knowledge and boost exam confidence.
掌握关键术语是GCSE CCEA工程学成功的关键。这本速记指南汇集了从材料、力学到电子和系统等核心主题的最重要词汇。每个术语都配有简明定义和中文翻译，以帮助记忆和双语理解。定期使用本指南来巩固知识，增强考试信心。
1. Materials & Properties | 材料与性能
Tensile Strength: The maximum stress a material can withstand while being stretched or pulled before breaking. It indicates how well a material resists tension.
抗拉强度：材料在受拉伸或拉动时断裂前所能承受的最大应力。它表明材料抵抗拉伸的能力。
Hardness: A measure of how resistant a material is to indentation, scratching, or wear. Hard materials resist surface deformation.
硬度：衡量材料抵抗压痕、划痕或磨损能力的指标。硬质材料能够抵抗表面变形。
Toughness: The ability of a material to absorb energy and plastically deform without fracturing. Tough materials combine strength and ductility.
韧性：材料吸收能量并发生塑性变形而不断裂的能力。韧性材料兼具强度和延展性。
Ductility: The capacity of a material to be drawn into a wire or elongated under tensile stress without breaking. Copper exhibits high ductility.
延展性：材料在拉伸应力下被拉成丝或伸长而不断裂的能力。铜具有高延展性。
Brittleness: The tendency of a material to fracture without significant plastic deformation. Brittle materials, like glass, fail suddenly under stress.
脆性：材料在没有明显塑性变形的情况下断裂的倾向。脆性材料（如玻璃）在应力下会突然失效。
Fatigue: The weakening of a material caused by repeated loading and unloading cycles, which can lead to crack initiation and failure below the normal tensile strength.
疲劳：材料因反复加载和卸载而导致的弱化，可能导致裂纹萌生并在低于正常抗拉强度的情况下失效。
2. Forces & Mechanics | 力与力学
Tension: A pulling force that acts to stretch an object. Structural members such as cables are often designed to bear tensile loads.
张力（拉力）：作用于拉伸物体的拉力。诸如缆绳等结构构件通常设计用于承受拉伸载荷。
Compression: A pushing force that tends to shorten or crush a component. Columns and struts primarily experience compression.
压力（压缩力）：趋于缩短或压碎构件的推力。柱子和支柱主要承受压缩力。
Shear Force: A force that acts parallel to a surface, causing layers of the material to slide relative to each other. Rivets and bolts often resist shear forces.
剪切力：平行于表面作用的力，导致材料层相互滑动。铆钉和螺栓通常用于抵抗剪切力。
Bending Moment: The internal moment that causes a beam to bend; it results from external forces applied perpendicular to the beam’s axis.
弯矩：导致横梁弯曲的内部力矩；它由垂直于梁轴的外力作用产生。
Torque: A turning or twisting force that causes rotation. Torque is applied by wrenches, motors, and drive shafts.
扭矩：导致旋转的转动力或扭力。扳手、电机和驱动轴会施加扭矩。
Stress and Strain: Stress is the internal resistance force per unit area within a material. Strain is the measure of deformation, defined as the change in length divided by the original length.
应力与应变：应力是材料内部单位面积上的抵抗力。应变是变形的量度，定义为长度变化除以原始长度。
σ = F ÷ A
ε = ΔL ÷ L₀
应力与应变公式：应力 σ 等于力 F 除以截面积 A；应变 ε 等于长度变化 ΔL 除以原始长度 L₀。
3. Manufacturing Processes | 制造工艺
Casting: A process where molten metal is poured into a mould cavity and allowed to solidify into the desired shape. Sand casting and die casting are common types.
铸造：将熔融金属浇入模腔并使其凝固成所需形状的工艺。砂型铸造和压力铸造是常见类型。
Forging: Shaping metal using compressive forces, often at high temperature, to improve grain structure and strength. Hammers or presses are used.
锻造：使用压缩力（通常在高温下）使金属成形，以改善晶粒结构和强度。使用锤或压力机。
Welding: A joining process that fuses materials, usually metals, by melting the workpieces and often adding a filler material to form a strong joint.
焊接：一种通过熔化工件并通常添加填充材料来熔合材料（通常是金属）以形成牢固接头的连接工艺。
Soldering: A lower-temperature joining method using a filler metal (solder) with a melting point below the workpieces, commonly used in electronics.
钎焊（软焊）：使用熔点低于工件的填充金属（焊料）的低温连接方法，常用于电子行业。
3D Printing (Additive Manufacturing): Building a part layer by layer from a digital model, using materials such as plastic filament or metal powder.
3D打印（增材制造）：根据数字模型逐层构建零件，使用塑料丝材或金属粉末等材料。
CNC Machining: Computer Numerical Control machining uses programmed commands to precisely remove material from a workpiece with cutting tools, achieving high accuracy.
数控加工（CNC）：计算机数控加工使用编程指令，通过刀具精确地从工件上去除材料，实现高精度加工。
4. Electronics & Circuits | 电子与电路
Voltage (V): The electrical potential difference between two points; it drives current through a circuit. Measured in volts (V).
电压（V）：两点之间的电势差；它驱动电流流过电路。以伏特（V）为单位测量。
Current (I): The rate of flow of electric charge through a conductor. Measured in amperes (A).
电流（I）：电荷通过导体的流动速率。以安培（A）为单位测量。
Resistance (R): The opposition to the flow of current. Measured in ohms (Ω). Resistors are used to control current and voltage levels.
电阻（R）：对电流流动的阻碍。以欧姆（Ω）为单位测量
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