Understanding ideas 课文精读 · 鲨鱼：危险动物还是濒危动物？
一、课文原文及逐段翻译
第1段
We see a woman swimming at night in a dark sea. Suddenly, she is pulled underwater. She surfaces, cries in fear, then disappears forever. This is the opening scene from the 1975 film Jaws, showing a shark attack. It tells the story of a great white shark that attacks and kills swimmers. Jaws was a great success, attracting huge audiences and winning many awards. It strengthened people's long-held idea of the great white shark as a dangerous animal.
我们看到一个女人夜晚在漆黑的海水里游泳。突然，她被拖到水下。她挣扎着浮出水面，发出惊恐的尖叫，然后就永远消失了。这是1975年电影《大白鲨》的开场画面，呈现了鲨鱼袭击的场景。电影讲述了一条大白鲨袭击并杀死游泳者的故事。《大白鲨》大获成功，吸引了大量观众并赢得了众多奖项。这部电影也加深了人们长期以来对大白鲨的固有印象：它是一种危险的动物。
第2段
People have always been scared of sharks, but Jaws made things worse. It made people frightened of sharks, especially of the great white shark. Many people who saw the film started to believe that sharks were bad animals that ate humans. Some people stopped swimming in the sea, afraid of the horrible creature from the film. Other people started fishing for sharks, killing as many as they could. At that time, nobody cared if sharks were killed, or how many were killed. People just wanted them killed.
人类本就害怕鲨鱼，而《大白鲨》使情况变得更糟。它让人们，尤其是大白鲨，感到恐惧。许多看过电影的人开始相信鲨鱼是吃人的坏动物。有些人因为害怕电影里那种可怕的生物，再也不去海里游泳了。另一些人则开始捕杀鲨鱼，能杀多少就杀多少。那时，没人在意鲨鱼被杀与否，也没人在意杀了多少。人们只想要它们死。
第3段
After 1975, the number of large sharks around America fell quickly, and soon fell around the world. This was not only due to fear of sharks, but also finning. Finning is a type of fishing where sharks are caught and their fins cut off. The sharks are thrown back into the sea where they die slowly and painfully. The fins are used in shark fin soup. Finning kills millions of sharks a year.
1975年之后，美国周边海域大型鲨鱼的数量迅速下降，很快这一趋势蔓延到全球。这不仅是因为对鲨鱼的恐惧，还因为"割鳍"。割鳍是一种捕捞方式，人们把鲨鱼捕获后割下鱼鳍。鲨鱼被扔回海里，在缓慢而痛苦的折磨中死去。鱼鳍被用来做鱼翅汤。每年有数百万鲨鱼死于割鳍。
第4段
Finning would have an unexpected effect upon Peter Benchley, the man who wrote the book the film Jaws was based on. In 1980, Benchley was diving when he came across a shark. He was filled with guilt and regret for the fear his book had created. He later became a passionate defender of sharks and worked to protect them. Today, we know that sharks are in danger of extinction, rather than being the dangerous threat people once imagined. It is time we stopped treating them as enemies and started protecting these misunderstood creatures of the sea.
割鳍给彼得·本奇利带来了意想不到的影响，正是他写了《大白鲨》电影所依据的那本书。1980年，本奇利在潜水时偶遇一条鲨鱼。他对自己书中引发的恐惧充满了内疚与悔恨。后来，他成了鲨鱼热情的捍卫者，并致力于保护它们。如今我们明白，鲨鱼正面临灭绝的危险，而非人们曾经想象的那种危险威胁。是时候停止把鲨鱼当作敌人，转而保护这些被误解的海洋生物了。
二、重点单词
attack n./v.：攻击；袭击。showing a shark attack
audience n.：观众；听众。attracting huge audiences
strengthen v.：加强；巩固。It strengthened people's long-held idea
scared adj.：害怕的；恐惧的。People have always been scared of sharks
frightened adj.：受惊的；害怕的。It made people frightened of sharks
horrible adj.：可怕的；令人恐惧的。afraid of the horrible creature
finning n.：割鳍（捕鲨取鳍）。This was also due to finning
fin n.：鱼鳍。their fins cut off
painfully adv.：痛苦地。die slowly and painfully
extinction n.：灭绝；消亡。sharks are in danger of extinction
guilt n.：内疚；罪责。He was filled with guilt and regret
passionate adj.：热情的；热烈的。a passionate defender of sharks
defender n.：捍卫者；防守者。became a passionate defender
misunderstood adj.：被误解的。these misunderstood creatures
三、一词多义与熟词生义
attack 常见义动词"攻击"，课文 a shark attack 作名词，指"（鲨鱼）袭击事件"。
creature 常见义"生物、创造物"，课文 the horrible creature from the film 指电影里的"怪兽、怪物"，带恐惧色彩。
fin 本义"鳍"，课文 finning 由其派生，指"割鳍（取翅）"这一行为，专有捕捞术语。
defender 常见义体育"防守队员"，课文 a passionate defender of sharks 取"捍卫者、保护者"义。
threat 课文 being the dangerous threat 中 threat 指"造成威胁的事物"，与 danger 近义但更强调"胁迫源"。
四、重点词块
opening scene 开场画面
pull underwater 拖入水下
a great success 大获成功
long-held idea 长期以来的看法
be scared of 害怕
be frightened of 对……感到恐惧
fish for sharks 捕杀鲨鱼
as many as they could 尽其所能地多
fall quickly 迅速下降
due to 由于；因为
cut off 割下；切断
in danger of extinction 面临灭绝危险
rather than 而不是
passionate defender 热情的捍卫者
五、长难句拆解
【原句 1】Jaws was a great success, attracting huge audiences and winning many awards.
【主干】Jaws was a great success.
【分层】attracting ... 与 winning ... 为现在分词短语作伴随/结果状语，逻辑主语是 Jaws。
【译文】《大白鲨》大获成功，吸引了大量观众并赢得众多奖项。
【考点】现在分词作伴随/结果状语；and 并列分词。
【原句 2】It strengthened people's long-held idea of the great white shark as a dangerous animal.
【主干】It strengthened people's idea.
【分层】long-held 为复合形容词作定语；of the great white shark 为 of 短语作后置定语；as a dangerous animal 为 as 介词短语作 idea 的补足，意为"把……视为"。
【译文】它加深了人们长期以来把大白鲨视为危险动物的固有印象。
【考点】复合形容词 long-held；of 短语作定语；as 介词短语作补语。
【原句 3】Finning is a type of fishing where sharks are caught and their fins cut off.
【主干】Finning is a type of fishing.
【分层】where 引导定语从句修饰 fishing；从句中 are caught 与 (are) cut off 由 and 连接作并列被动谓语。
【译文】割鳍是一种捕捞方式，鲨鱼被捕获后鱼鳍被割下。
【考点】where 定语从句（修饰抽象地点 fishing）；并列被动谓语。
【原句 4】The sharks are thrown back into the sea where they die slowly and painfully.
【主干】The sharks are thrown back into the sea.
【分层】where 引导定语从句修饰 the sea；die slowly and painfully 为并列副词修饰 die。
【译文】鲨鱼被扔回海里，在缓慢而痛苦的折磨中死去。
【考点】where 定语从句（地点）；并列副词作状语。
【原句 5】】Finning would have an unexpected effect upon Peter Benchley, the man who wrote the book the film Jaws was based on.
【主干】Finning would have an effect upon Peter Benchley.
【分层】the man 为 Peter Benchley 的同位语；who wrote ... 为 who 定语从句修饰 the man；the film Jaws was based on 为省略 that/which 的定语从句修饰 the book（based on 后缺宾语，关系词作介词 on 的宾语）。
【译文】割鳍给彼得·本奇利带来了意想不到的影响，正是他写了《大白鲨》电影所依据的书。
【考点】同位语；who 定语从句；嵌套的省略关系词定语从句（介词 on 宾语）。
六、语法点清单
1. 现在分词作伴随/结果状语
attracting huge audiences and winning many awards。分词逻辑主语为主句主语 Jaws。
2. 定语从句（where / who）
where sharks are caught（修饰 fishing/sea）；who wrote the book（修饰 the man）。注意 where 可用于抽象地点。
3. 被动语态（are caught / are thrown）
sharks are caught and their fins cut off；are thrown back。描述客观过程用一般现在时被动。
4. 同位语
the man who wrote the book ...，the man 解释 Peter Benchley 的身份。
5. 嵌套定语从句（省略关系词）
the book (that/which) the film Jaws was based on。关系词作介词 on 的宾语可省略。
6. 并列结构（and / or）
attracting ... and winning ...；are caught and (are) cut off。and 连接并列分词或并列谓语。
七、逻辑链
现象（第1段）：《大白鲨》电影成功 → 强化"鲨鱼危险"的刻板印象
↓
后果一（第2段）：电影加剧恐惧 → 人们避海、滥捕鲨鱼，只求杀之
↓
后果二（第3段）：数量骤降 → 主因除恐惧外更有"割鳍"取翅之恶
↓
转折（第4段）：作者本奇利悔悟 → 由恐惧制造者变为保护者；今日鲨鱼濒危，应转保护
这是一篇"破偏见、立真相"的议论/说明文：第1—2段以电影《大白鲨》说明"鲨鱼危险"印象的由来；第3段揭示滥捕与割鳍导致数量锐减；第4段以作者转变和"鲨鱼实则濒危"的事实反转认知，点明题旨——鲨鱼是被误解者，亟需保护。
八、写作迁移
模板 1：It strengthened people's long-held idea of ... as ...
课文：It strengthened people's long-held idea of the great white shark as a dangerous animal.
仿写：The ad strengthened people's long-held idea of the brand as a symbol of youth.（这则广告强化了人们对该品牌"青春象征"的固有印象。）——用于说明某事物强化某种观念。
模板 2：At that time, nobody cared if ... or how ...
课文：At that time, nobody cared if sharks were killed, or how many were killed.
仿写：At that time, nobody cared if the river was polluted, or how dirty it had become.（那时，没人在意河流是否受损，也没人在意它有多脏。）——用于描写过去的漠视态度。
模板 3：This was not only due to ..., but also ...
课文：This was not only due to fear of sharks, but also finning.
仿写：The accident was not only due to bad weather, but also human error.（这起事故不仅因为恶劣天气，也因为人为失误。）——用于分析多重原因。
模板 4：He was filled with guilt and regret for ...
课文：He was filled with guilt and regret for the fear his book had created.
仿写：She was filled with guilt and regret for the words she had said in anger.（她为自己怒中说出的话充满了内疚与悔恨。）——用于描写后悔情绪。
模板 5：It is time we stopped ... and started ...
课文：It is time we stopped treating them as enemies and started protecting these misunderstood creatures.
仿写：It is time we stopped wasting food and started valuing every meal.（是时候停止浪费食物、开始珍惜每一餐了。）——用于结尾呼吁行动（虚拟语气）。
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