📚 Year 10 CAIE Law: Quick Reference to Key Principles and Definitions | CAIE 十年级法律：关键原则与定义速查手册
This quick reference handbook covers the essential legal principles, definitions and key concepts you need to master for Year 10 CAIE Law. Each section pairs an English explanation with its Chinese translation to support bilingual revision and exam preparation.
本速查手册涵盖了 CAIE 十年级法律课程必须掌握的核心法律原则、定义和关键概念。每节均提供英文解释和中文翻译，助力双语复习和备考。
1. Actus Reus: The Guilty Act | 犯罪行为：有罪行为
Actus reus refers to the physical element of a crime. It can be an act, an omission (where a legal duty exists), or a state of affairs. The act must be voluntary and must cause the prohibited consequence in result crimes. For example, in murder, the actus reus is the unlawful killing of a human being.
犯罪行为（actus reus）是指犯罪的物理要素。它可以是一个作为、不作为（在存在法律义务的情况下）或某种事态。该行为必须是自愿的，且在结果犯中必须造成所禁止的后果。例如，在谋杀罪中，犯罪行为是非法杀害他人。
Omissions only give rise to liability if the defendant had a legal duty to act. Such duties can arise from statute, contract, a special relationship, voluntary assumption of responsibility, or creation of a dangerous situation.
只有被告负有法律作为义务时，不作为才会产生刑事责任。这些义务可能来源于成文法、合同、特殊关系、自愿承担责任或制造了危险情况。
2. Mens Rea: The Guilty Mind | 犯罪意图：有罪心理
Mens rea is the mental element of a crime. It encompasses different levels of fault: direct intent (purpose), oblique intent (foresight of virtual certainty), recklessness (conscious taking of an unjustified risk), and negligence (breach of a duty of care without awareness). The highest level is intention, often required for the most serious offences.
犯罪意图（mens rea）是犯罪的心理要素。它包括不同程度的主观过错：直接故意（有目的）、间接故意（预见为必然结果）、轻率（有意识地冒不合理风险）和过失（未察觉地违反注意义务）。最严重的罪行通常要求意图这一最高层级。
Transferred malice applies when the mens rea intended for one victim is transferred to the actual unintended victim, provided the actus reus is similar in nature. Coincidence of actus reus and mens rea is a fundamental principle; both must occur simultaneously for liability to be established.
犯意转移原则（transferred malice）适用于原先针对一名被害人的犯意转移到实际非预期的被害人，前提是犯罪行为性质相类似。犯罪行为与犯罪意图同时发生是一项基本原则，两者必须同时存在才能确立责任。
3. Strict Liability | 严格责任
Strict liability offences do not require proof of mens rea for at least one element of the actus reus. Many regulatory crimes, such as selling alcohol to minors or speeding, fall into this category. The prosecution only needs to prove the defendant committed the prohibited act. Defences such as due diligence may sometimes be available by statute.
严格责任犯罪至少不要求证明犯罪行为中某一要素的犯意。许多行政监管类犯罪，如向未成年人售酒或超速驾驶，都属于此类。控方只需证明被告实施了禁止行为。在某些情况下，成文法可能允许以尽职调查作为抗辩。
4. Elements of a Contract | 合同要素
A valid contract requires: offer and acceptance (agreement), consideration, intention to create legal relations, and capacity. An offer must be distinguished from an invitation to treat, which is an invitation to negotiate (e.g., goods on display). Acceptance must be communicated and unconditional.
一份有效合同需要：要约与承诺（合意）、对价、设立法律关系的意图和行为能力。要约必须区别于要约邀请，后者是谈判的邀请（如陈列商品）。承诺必须被传达且为无条件。
Consideration is the exchange of value. It must be sufficient but need not be adequate; past consideration is not valid consideration. Intention to create legal relations is presumed in commercial agreements but not in domestic or social arrangements.
对价是价值的交换。它必须是充分的，但不必等价；过去的对价不属于有效对价。在商业协议中推定具有设立法律关系的意图，但在家庭或社交安排中则没有这一推定。
5. Negligence in Tort Law | 侵权法中的过失
To establish negligence, the claimant must prove: the defendant owed a duty of care, breached that duty, and the breach caused damage that is not too remote. The neighbour principle from Donoghue v Stevenson established that a duty is owed to those who are closely and directly affected by one's actions.
要证明过失成立，原告必须证明：被告负有注意义务、违反了该义务、该违反造成了非过于遥远的损害。源自 Donoghue v Stevenson 案的邻人原则确定了注意义务应及于那些受到自己行为密切和直接影响的人。
The standard of care is that of the reasonable person. Breach is assessed by weighing factors such as the likelihood of harm, the seriousness of potential injury, the cost of precautions and the social utility of the activity. Causation involves both factual causation ('but for' test) and legal causation (remoteness of damage).
注意标准是理性人的标准。是否违反义务要考虑伤害发生的可能性、潜在伤害的严重性、预防措施的成本以及活动的社会效益等因素。因果关系包括事实因果关系（“若无则不”检验）和法律因果关系（损害的遥远性）。
6. The Doctrine of Precedent | 先例原则
Precedent, or stare decisis, requires lower courts to follow the ratio decidendi (legal reasoning) of higher courts. The ratio is the binding part of the judgment, while obiter dicta are persuasive though not binding. The Supreme Court (formerly the House of Lords) is the highest appellate court and its decisions bind all courts below.
先例原则（stare decisis）要求下级法院遵循上级法院的判决依据（ratio decidendi）。判决依据是判决书中具有约束力的部分，而附带意见虽具说服力但不具约束力。最高法院（原上议院）是最高上诉法院，其判决约束所有下级法院。
The Court of Appeal is bound by its own previous decisions with limited exceptions. Judicial law-making through precedent enables the law to adapt gradually to new situations, while ensuring consistency and fairness.
上诉法院一般受其自身先前判决的约束，但有少数例外。通过先例进行的司法造法使法律能逐渐适应新情况，同时保证一致性和公平性。
7. Criminal vs Civil Law | 刑法与民法
Criminal law deals with conduct that the State considers harmful to society. The prosecution must prove guilt beyond reasonable doubt. Punishments include imprisonment, fines, and community orders. The case name is usually R v Defendant (e.g., R v Smith).
刑法处理国家认为对社会有害的行为。控方必须排除合理怀疑地证明被告有罪。刑罚包括监禁、罚金和社区令。案件名称通常为 R v 被告（如 R v Smith）。
Civil law settles disputes between individuals or organisations. The claimant must prove liability on the balance of probabilities. Remedies include damages, injunctions, and specific performance. Case names are typically Claimant v Defendant (e.g., Smith v Jones).
民法解决个人或组织之间的纠纷。原告必须以盖然性权衡的标准证明法律责任。救济措施包括损害赔偿、禁制令和特定履行。案件名称通常为原告 v 被告（如 Smith v Jones）。
8. The Standard of Proof | 举证标准
In criminal cases, the standard of proof is 'beyond reasonable doubt'. This means the evidence must be so convincing that a reasonable person would have no doubt as to the defendant's guilt. The burden of proof generally rests on the prosecution.
刑事案件中的举证标准是“排除合理怀疑”。这意味着证据必须足够令人信服，使一个理性的人对被告的罪行不存在疑问。举证责任通常在于控方。
In civil cases, the standard is 'on the balance of probabilities', which means something is more likely than not to have happened. The burden usually lies on the claimant who brings the case.
民事案件的标准是“盖然性权衡”，即某事发生的可能性大于不发生的可能性。举证责任通常由提起诉讼的原告承担。
9. Defences in Criminal Law | 刑法中的抗辩
A defence can negate liability or reduce the severity of the charge. Self-defence allows the use of reasonable force to protect oneself, others, or property. The force must be proportionate to the threat as the defendant honestly perceived it.
抗辩理由可以否定责任或降低指控的严重程度。正当防卫允许使用合理的武力保护自己、他人或财产。所用力必须与被告真诚认知到的威胁相称。
Insanity, automatism, duress, and necessity are general defences. Intoxication is rarely a defence, but may be relevant in crimes of specific intent if it prevented the formation of mens rea. Consent may provide a defence to some non-fatal offences against the person.
精神失常、无意识行为、胁迫和紧急避险是一般抗辩事由。醉酒很少构成抗辩，但在特定意图犯罪中，如果它阻碍了犯意的形成，则可能相关。同意可以成为某些非致命侵犯人身罪的抗辩。
10. Sources of English Law | 英国法的渊源
English law comes from several sources. Primary legislation (Acts of Parliament) is the supreme form of law under the doctrine of parliamentary sovereignty. Secondary legislation is made by ministers under powers delegated by Parliament.
英国法有多个渊源。一级立法（议会法案）在议会主权原则下是最高法律形式。二级立法由部长根据议会授权的权力制定。
Case law (common law and equity) developed through judicial decisions in the courts. European Union retained law and international treaties also play a role. Custom, though rarely, can still be a source if it has existed since time immemorial, is reasonable, certain, and exercised as of right.
判例法（普通法和衡平法）通过法院的司法判决发展而来。保留的欧盟法律和国际条约也发挥了作用。习惯虽极少见，但如果自远古以来就一直存在、合理、确定且以权利形式行使，仍可作为法律渊源。
11. Human Rights and the Law | 人权与法律
The Human Rights Act 1998 incorporated the European Convention on Human Rights into UK law. It requires public authorities to act compatibly with Convention rights and permits courts to make declarations of incompatibility if primary legislation cannot be interpreted consistently with them.
《1998 年人权法》将《欧洲人权公约》纳入了英国法。它要求公共机构以符合公约权利的方式行事，并允许法院在一级立法无法作出一致解释时作出不一致宣告。
Key protected rights include the right to life, prohibition of torture, right to a fair trial, right to respect for private and family life, freedom of expression, and freedom of assembly. These rights are qualified, meaning they may be restricted where necessary and proportionate in a democratic society.
受保护的基本权利包括生命权、免受酷刑、公正审判权、尊重私人和家庭生活的权利、言论自由和集会自由。这些权利都是有限制的，意味着在民主社会中，必要时且合比例地可加以限制。
12. Criminal Procedure Basics | 刑事程序基础
Criminal cases in England and Wales are divided into three categories based on seriousness: summary offences (least serious, tried in the magistrates' court), either-way offences (can be tried in either the magistrates' or the Crown Court), and indictable-only offences (most serious, must be tried in the Crown Court).
英格兰和威尔士的刑事案件根据严重程度分为三类：简易罪（最轻微，由治安法院审理）、两可罪（可在治安法院或刑事法院审理）和必诉罪（最严重，必须在刑事法院审理）。
The defendant's plea is crucial. A guilty plea may lead to a reduced sentence. Legal aid may be available. The prosecution must disclose the evidence it intends to rely on, and the defence is entitled to see unused material that might assist its case.
被告人的答辩至关重要。认罪答辩可能导致减刑。可能获得法律援助。控方必须披露其打算依赖的证据，被告方有权查阅可能有助于其辩护的未使用材料。
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