📚 Engineering Vocabulary Quick Memory Guide | 工程词汇速记指南
Memorising technical vocabulary is one of the biggest hurdles for Year 11 Cambridge Engineering students. This guide breaks down key terms by topic and pairs each with a simple memory trick, helping you recall definitions quickly during exams and practical tasks. Use these visual and word‑play links to lock in meaning alongside the formal definition.
记忆技术词汇是剑桥Year 11工程学生面临的最大挑战之一。本指南按主题分解关键词汇，并为每个术语搭配简单的记忆诀窍，帮助你在考试和实践任务中迅速回忆起定义。借助这些视觉联想与文字游戏，将术语含义和正式定义一起牢牢锁定。
1. Materials & Properties | 材料与性质
Tensile strength – the maximum stress a material can withstand while being pulled or stretched before it breaks.
抗拉强度 – 材料在被拉伸或拉断前所能承受的最大应力。速记：tensile 听起来像 tension（拉力），想象拔河时绳子最后的倔强。
Hardness – the resistance of a material to indentation, scratching, or wear.
硬度 – 材料抵抗压痕、刮擦或磨损的能力。速记：用指甲划一块塑料和一块钢，哪个留痕就知谁硬。
Ductility – the ability of a material to be drawn into a wire without breaking.
延展性 – 材料能被拉成丝而不断裂的能力。速记：duct 让人想起 conduct（引导），金属顺着模具引导成丝。
Elastic limit – the point beyond which a material will no longer return to its original shape when the load is removed.
弹性极限 – 卸载后材料不再恢复原状的临界点。速记：弹簧拉过头就会永久变形，超过这个极限它忘了自己是谁。
2. Forces & Moments | 力与力矩
Moment – ect of a force about a pivot, calculated as force × perpendicular distance from the pivot.
力矩 – 力绕支点的转动效应，等于力 × 支点到力作用线的垂直距离。速记：moment = 力臂长一分，省力十分，扳手越长越省劲。
Equilibrium – a state where the resultant force and resultant moment on a body are both zero.
平衡 – 物体所受合力与合力矩都为零的状态。速记：equal + libra（天平），想象跷跷板对静止。
Reaction force – the force exerted by a support or surface in response to a load, acting at 90° to the surface.
反作用力 – 支撑物或表面对载荷的回应力，垂直于表面作用。速记：你压桌子，桌子向上撑你，如同牛顿第三定律的握手。
Centre of gravity – the point where the entire weight of an object appears to act.
重心 – 物体重量的总作用点。速记：想象用一根手指顶住物体就能平衡，那一点就是重心。
3. Structural Elements | 结构构件
Strut – a structural member that carries compressive forces, usually designed to resist buckling.
压杆 – 承受压力的结构杆件，通常被设计来抵抗弯曲失稳。速记：strut 想起来自 strong，它被挤压却很坚强。
Tie – a member designed to carry tensile forces, such as a cable or rod in tension.
拉杆 – 承受拉力的构件，如受拉的钢缆或杆。速记：tie 就像领带拉紧脖子，它在结构里拉紧不放松。
Shear force – the internal force acting parallel to the cross‑section of a structural member, tending to cause layers to slide past one another.
剪力 – 平行于杆件横截面作用的内力，倾向使各层相互滑移。速记：剪刀 (shear) 剪纸，两层反向滑移，结构里剪力就像纸被剪。
Bending moment – the internal moment that causes a beam to bend, equal to the algebraic sum of moments on one side of a section.
弯矩 – 使梁弯曲的内部力矩，等于截面一侧外力矩的代数和。速记：bending 是弯，moment 是力矩，一弯就有矩。
4. Mechanisms & Motion | 机构与运动
Lever – a rigid bar that pivots on a fulcrum to multiply force or change direction of effort.
杠杆 – 一根绕支点转动的刚性杆，用于放大力量或改变施力方向。速记：lever 听起来像 lift，它能帮你抬起重物。
Gear ratio – the ratio of the number of teeth on a driven gear to the number of teeth on the driver gear, determining speed and torque change.
齿轮比 – 从动轮齿数与主动轮齿数之比，决定转速与扭矩变化。速记：齿数比越大，输出越慢但越有劲，像自行车爬坡换大飞轮。
Cam – a rotating or sliding piece that converts rotary motion into reciprocating motion.
凸轮 – 将旋转运动转化为往复运动的旋转或滑动部件。速记：cam 的形状像鸡蛋，一转就把从动件推上推下。
Linkage – an assembly of rigid bars connected by joints, used to transmit motion and force.
连杆机构 – 由铰链连接的刚性杆组件，用于传递运动和力。速记：link 指连接，这些杆连起来就能把运动从这儿传到那儿。
5. Electronics & Circuits | 电子与电路
Resistor – a component that opposes the flow of electric current, causing a voltage drop.
电阻器 – 阻碍电流流动并产生电压降的元件。速记：resist 就是抵抗，像人流中的窄门，电流通过时费劲。
Potential difference (p.d.) – the work done per unit charge to move a charge between two points, measured in volts.
电位差 – 将单位电荷从一点移到另一点所做的功，单位伏特。速记：高低水位差产生水流，电位差推动电荷流动。
Transducer – any device that converts one form of energy into another, e.g. microphone (sound to electrical).
换能器 – 将一种能量形式转化为另一种的装置，如话筒（声→电）。速记：trans 表示转换，ducer 好像 producer，它产生另一种能量。
Ohm's Law – ectly proportional to the potential difference across it, at constant temperature: V = IR.
欧姆定律 – 在温度不变时，通过导体的电流与其两端电位差成正比：V = IR。速记：V 先来，等于 I × R，顺序用 Very Important Rule 记。
6. Manufacturing Processes | 制造工艺
Turning – a machining process where a single‑point cutting tool removes material from a rotating workpiece, usually on a lathe.
车削 – 在车床上用单刀刀具从旋转的工件上切除材料的加工方法。速记：工件转 (turn)，刀具不转，像削苹果皮。
Milling – a process using a rotating multi‑tooth cutter to remove material from a stationary workpiece.
铣削 – 用旋转的多齿铣刀从固定工件上切除材料的工艺。速记：mill 像风车转，刀转工件不动。
Injection moulding – a process where molten polymer is forced into a mould cavity under high pressure and then cooled.
注塑成型 – 将熔融聚合物在高压下注入模具型腔并冷却成型的工艺。速记：注射器 (injection) 把热塑料打进去，模具里凝固。
Annealing – heat treatment that softens a metal, relieves internal stresses, and refines grain structure.
退火 – 使金属软化、消除内应力、细化晶粒的热处理工艺。速记：an‑ 像 un‑，neal 近似 kneel，让金属内部应力“跪下”休养生息。
7. Systems & Control | 系统与控制
Open‑loop system – a control system where the output has no effect on the input; no feedback.
开环系统 – 输出对输入无影响的控制系统，没有反馈。速记：你要烧水，设定时间转它就转，不管水开没开，一路走到黑。
Feedback – a portion of the output signal returned to the input to compare with the desired value and adjust the system.
反馈 – 输出信号的一部分返回输入端与期望值比较并调整系统。速记：像老师给你批改作业，你根据评语改进。
Microcontroller – a compact integrated circuit designed to govern a specific operation in an embedded system.
微控制器 – 一个紧凑的集成电路，用于控制嵌入式系统中的特定操作。速记：micro 小，controller 控制，小芯片当大脑。
Actuator – a device that converts an electrical signal into physical movement, such as a motor or solenoid.
执行器 – 将电信号转换为物理运动的装置，如电动机或电磁铁。速记：act 行动，actuator 是让系统动起来的家伙。
8. Health, Safety & Quality | 健康、安全与质量
Risk assessment – a systematic process of identifying hazards, evaluating risks, and implementing control measures.
风险评估 – 辨识危险、评价风险并实施控制措施的系统过程。速记：RISK 记住四个字母：Recognise, Identify, Score, Keep safe。
Personal Protective Equipment (PPE) – equipment worn to minimise exposure to hazards, e.g. goggles, gloves, steel‑toe boots.
个人防护装备 (PPE) – 为减少危害暴露而穿戴的装备，如护目镜、手套、安全鞋。速记：PPE 是你身体的最后一道防线，像骑士的盔甲。
Tolerance – the permissible limit of variation in a physical dimension; the difference between upper and lower limits.
公差 – 物理尺寸的允许变动范围，即上下极限之差。速记：tolera‑ 来自拉丁语“忍受”，零件尺寸稍大一点小一点都能忍。
Quality control (QC) – the inspection and testing of products to ensure they meet specified standards.
质量控制 (QC) – 对产品进行检验和测试以确保其符合指定标准。速记：QC 就像终点的守门员，不让不合格品溜走。
9. Engineering Drawing & Symbols | 工程制图与符号
Orthographic projection – a method of representing a 3D object using several 2D views, typically front, top, and side.
正投影 – 使用多个二维视图（通常为正、俯、侧）来表示三维物体的方法。速记：ortho 是“正”，投射直角方向看，就像从盒子开口看进去。
Isometric drawing – a pictorial drawing where the three axes are equally inclined to the plane of projection, with equal scaling along each axis.
等轴测图 – 三条轴与投影面成相同角度、各轴比例相等的立体图。速记：iso 意思是相等，metric 测量，三轴等量。
Dimension line – a thin line with arrowheads used to indicate the measured distance between two points on a drawing.
尺寸线 – 带有箭头的细线，用于标明图上两点之间的测量距离。速记：它直接告诉你“从这里到那里有多长”，线条即是尺子。
Section view – a drawing showing the interior details of an object as if part of it has been cut away.
剖视图 – 像把物体切开一样的视图，显示内部细节。速记：section 就像切蛋糕，切一刀看到里面分层。
10. Energy, Power & Efficiency | 能量、功率与效率
Work done – ect through a distance: W = F × d (when force and displacement are in the same direction).
做功 – 力使物体移动一段距离所传递的能量：W = F × d（力与位移同向时）。速记：做功就是力陪着物体走一程，走不动就没做功。
Power – the rate at which work is done or energy is transferred, P = W ÷ t, unit watt.
功率 – 做功或能量传递的速率，P = W ÷ t，单位瓦特。速记：power 像强壮的马，活儿干得快功率就大。
Efficiency – the ratio of useful energy output to total energy input, often expressed as a percentage.
效率 – 有用能量输出与总能量输入之比，常用百分数表示。速记：effi‑ 谐音“一飞”，别让能量乱飞，有用部分越高越好。
Turbine – a rotary device that extracts energy from a moving fluid (steam, gas, water) and converts it into mechanical work.
涡轮机 – 从流动流体（蒸汽、燃气、水）中提取能量并转化为机械功的旋转装置。速记：tur‑ 像 turn，轮子被冲转，流体给它动力。
11. Fasteners & Joining | 紧固件与连接
Bolt – a threaded fastener with a head, used with a nut to clamp parts together.
螺栓 – 带头的螺纹紧固件，与螺母配合夹紧零件。速记：bolt 听起来像“抱”，螺栓螺母抱在一起不松手。
Rivet – a permanent mechanical fastener consisting of a smooth cylindrical shaft with a head, deformed after insertion to hold materials together.
铆钉 – 一种永久的机械紧固件，由光滑圆柱杆和头部组成，插入后变形以固定材料。速记：rivet 像 river（河流），铆接就像让两块板在一条河的两岸再也不能分开。
Solder – a fusible metal alloy used to join metal workpieces by melting and flowing into the joint.
焊料 – 一种易熔金属合金，通过熔化并流入接头来连接金属工件。速记：solder 像 soldier（士兵），它像士兵一样占领缝隙，凝固后坚守阵线。
Adhesive bonding – joining materials using a chemical adhesive that sets to form a strong surface attachment.
胶接 – 使用化学粘合剂固化形成牢固表面连接的工艺。速记：adhesive 记住“add + heave”，加上去就黏住，像胶水一样。
12. Sustainability & the Environment | 可持续性与环境
Life cycle assessment (LCA) – a technique to evaluate environmental impacts associated with all stages of a product's life, from raw material extraction to disposal.
生命周期评估 (LCA) – 评估产品从原材料提取到处置全过程对环境影响的技术。速记：从摇篮到坟墓，看产品一生留下多少脚印。
Renewable energy – energy from sources that are naturally replenished on a human timescale, such as solar, wind, and hydro.
可再生能源 – 在人类时间尺度内自然补充的能源，如太阳能、风能、水力。速记：re‑new‑able，能重新来的，太阳天天升，风时时吹。
Carbon footprint – the total greenhouse gas emissions caused directly and indirectly by an individual, organisation, event, or product.
碳足迹 – 个人、组织、事件或产品直接和间接产生的温室气体排放总量。速记：每走一步都留下碳的脚印，踩得越多地球越热。
Biodegradable – capable of being decomposed by bacteria or other living organisms, thus avoiding persistent waste.
可生物降解 – 能被细菌或其他生物分解，从而避免持久性废物。速记：bio 是生命，degradable 可降解，大自然能把它吃掉。
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