Reading and Thinking 课文精读 · 约翰·斯诺战胜“霍乱王”
一、课文原文及逐段翻译
第1段
Cholera used to be one of the most feared diseases in the world, until a British doctor, John Snow, showed how it could be overcome.
霍乱曾是世界上最令人恐惧的疾病之一，直到一位英国医生——约翰·斯诺——展示了它是如何被征服的。
第2段
In the early 19th century, when an outbreak of cholera hit Europe, millions of people died from the disease. At that time, neither its cause nor its cure was understood. So many thousands of terrified people died every time there was an outbreak. John Snow wanted to solve the problem and help stop the terrible deaths.
十九世纪初，霍乱暴发、肆虐欧洲，数百万人因此丧命。那时，人们既不知道它的病因，也不懂如何治疗。每次霍乱暴发，都有成千上万惊恐的人死去。约翰·斯诺想解决这一问题，帮助制止这种可怕的死亡。
第3段
However, he never lost his desire to destroy cholera once and for all.
然而，他从未放弃彻底消灭霍乱的愿望。
第4段
In general, doctors in those days had two contradictory theories to explain how cholera spread. One theory was that bad air caused the disease. Another was that cholera was caused by an infection from germs in food or water. Snow subscribed to the second theory. It was correct, but he still needed proof. Therefore, when an outbreak of cholera hit London in 1854, Snow began to investigate.
总的来说，当时的医生有两种截然相反的理论来解释霍乱是如何传播的。一种理论认为污浊的空气致病；另一种认为霍乱由食物或饮用水中的细菌感染引起。斯诺赞同第二种理论。这一看法是正确的，但他仍需要证据。因此，1854年伦敦暴发霍乱时，斯诺便开始调查。
第5段
Snow began by marking on a map the exact places where all those who died had lived. There were multiple deaths near the water pump in Broad Street, especially 16, 37, 38 and 40. However, some households (such as 20 and 21 Broad Street, and 8 and 9 Cambridge Street) had no deaths. These people worked in the pub at 7 Cambridge Street. They had been given free beer, and so had not drunk the water from the pump.
斯诺首先在地图上标出所有死者住所的确切位置。宽街水泵附近有多例死亡，尤其是16、37、38和40号住宅。然而，有些住户（如宽街20号和21号、剑桥街8号和9号）却无人死亡。这些人在剑桥街7号的酒吧工作，酒吧提供免费啤酒，因此他们没有饮用泵里的水。
第6段
The truth was that the water from the Broad Street pump had been infected by waste. Moreover, Snow was later able to show that other outbreaks of cholera were also linked to the water companies in London. Some companies sold water from the River Thames that was polluted by raw waste. People who drank this water were much more likely to get cholera than those who drank pure or boiled water.
真相是宽街水泵抽上来的水被废弃物污染了。此外，斯诺后来还证明，伦敦其他几起霍乱病例也与饮用水公司有关。有些公司出售取自泰晤士河的水，而河水被未经处理的废弃物污染。与饮用纯净水或开水的人相比，喝这种水的人染上霍乱的概率要大得多。
第7段
Through Snow’s tireless efforts, water companies began to sell clean water and the threat of cholera around the world was reduced.
经过斯诺的不懈努力，自来水公司开始出售洁净水，世界各地霍乱的威胁得以减轻。
第8段
However, cholera is still a problem. Each year, millions of people around the world get cholera and many die from it. Fortunately, because of the work of John Snow, we now know how to prevent cholera. Moreover, using maps and statistics to solve real-world problems is a common method in public health research.
然而，霍乱至今仍是难题。每年全球有数百万人感染霍乱，许多人因此死亡。幸运的是，得益于约翰·斯诺的工作，我们现在已知道如何预防霍乱。此外，运用地图与统计来解决现实问题，已成为公共卫生研究中常用的方法。
二、重点单词
cholera n.：霍乱（一种急性传染病）。Cholera used to be one of the most feared diseases.
feared adj.：令人恐惧的；受惧怕的。one of the most feared diseases（最令人恐惧的疾病之一）
outbreak n.：（疾病、战争等的）爆发。an outbreak of cholera hit Europe
cure n. / v.：治疗；治愈；疗法。neither its cause nor its cure was understood
contradictory adj.：矛盾的；对立的。two contradictory theories（两种相反的理论）
theory n.：理论；学说。doctors had two contradictory theories
infect v.：传染；感染。the water had been infected by waste
subscribe v.：同意；赞成（subscribe to）；订阅。Snow subscribed to the second theory
proof n.：证据；证明。he still needed proof
pump n.：泵；水泵。the water pump in Broad Street
multiple adj.：多个的；多种多样的。There were multiple deaths near the pump.
household n.：家庭；住户。some households had no deaths
raw adj.：未加工的；生的。polluted by raw waste（未经处理的废弃物）
tireless adj.：不知疲倦的；不懈的。Through Snow’s tireless efforts
threat n.：威胁；恐吓。the threat of cholera was reduced
statistics n.：统计；统计学。using maps and statistics
defeat v.：击败；战胜。John Snow Defeats “King Cholera”
三、一词多义与熟词生义
defeat 常见义为"在竞赛、战争中击败对手"，课文标题中 Defeats “King Cholera” 引申为"战胜（疾病）"，把霍乱拟人化为"霍乱王"。
pump 作名词本义是"泵"，课文 water pump 指"水泵、抽水机"，是具体的生活/工程设备。
raw 常见义指"生的（食物）、未煮熟的"，课文中 raw waste 意为"未经处理的废弃物"，引申为"未加净化的"。
proof 常见义"证据、证明"，课文 he still needed proof 中作不可数名词，强调"实证、佐证"。
theory 常见义"理论"，与 practice（实践）相对；课文指医生对病因的"学说、看法"。
四、重点词块
used to be 过去常常是（现在已不）
one of the most feared diseases 最令人恐惧的疾病之一
in the early 19th century 在十九世纪初
die from 死于（某种原因）
once and for all 一劳永逸地；彻底地
in general 总的来说；一般而言
subscribe to 同意；赞成（某一观点）
begin by doing 以……开始；首先做
mark on a map 在地图上标出
be linked to 与……有关联；与……有联系
raw waste 未经处理的废弃物
tireless efforts 不懈的努力
the threat of ……的威胁
because of 由于；因为
solve real-world problems 解决现实问题
五、长难句拆解
【原句 1】Cholera used to be one of the most most feared diseases in the world, until a British doctor, John Snow, showed how it could be overcome.
【主干】Cholera used to be one of the most feared diseases.
【分层】until 引导时间状语从句，其中 a British doctor 与 John Snow 为同位语关系；showed 后接 how 引导的宾语从句，it 指代 cholera，could be overcome 为含情态动词的被动语态。
【译文】霍乱曾是世界上最令人恐惧的疾病之一，直到一位英国医生——约翰·斯诺——展示了它是如何被征服的。
【考点】until 时间状语从句；同位语；how 宾语从句；情态动词被动语态。
【原句 2】In general, doctors in those days had two contradictory theories to explain how cholera spread.
【主干】doctors had two contradictory theories.
【分层】In general 为评注性状语；in those days 作后置定语修饰 doctors；to explain ... 为不定式作目的/后置定语修饰 theories；explain 后接 how 引导的宾语从句。
【译文】总的来说，当时的医生有两种截然相反的理论来解释霍乱是如何传播的。
【考点】不定式作后置定语；how 宾语从句；前置定语 contradictory。
【原句 3】Snow began by marking on a map the exact places where all those who died had lived.
【主干】Snow began by marking the exact places.
【分层】by marking ... 为 by + 动名词作方式状语；on a map 为地点状语；the exact places 后接 where 引导的定语从句；该定语从句中又嵌 who died 这一修饰 those 的定语从句。
【译文】斯诺首先通过在地图上标出所有死者生前住所的确切位置来着手调查。
【考点】by + doing 方式状语；where 定语从句嵌套 who 定语从句（多层定语）。
【原句 4】The truth was that the water from the Broad Street pump had been infected by waste.
【主干】The truth was that ...（表语从句）。
【分层】that 引导表语从句；from the Broad Street pump 为介词短语作后置定语修饰 water；从句谓语 had been infected 为过去完成时的被动语态，by waste 引出动作执行者。
【译文】真相是宽街水泵抽上来的水被废弃物污染了。
【考点】that 表语从句；过去完成时被动语态；介词短语后置定语。
【原句 5】People who drank this water were much more likely to get cholera than those who drank pure or boiled water.
【主干】People were much more likely to get cholera than those.
【分层】who drank this water 为修饰 People 的定语从句；than 引出比较对象 those（那些人）；those 后接 who drank ... 定语从句；more likely to do 为"更可能做某事"结构。
【译文】喝这种水的人比喝纯净水或开水的人更容易染上霍乱。
【考点】who 定语从句；than 比较结构；more likely to do。
六、语法点清单
1. 一般过去时叙述过去事件
全文主体用一般过去时讲述斯诺的调查（wanted, showed, began, marked, was, proved 等），是人物/事件记叙的时态骨架。
2. 过去完成时被动语态
had been infected by waste；had been given free beer。强调"过去的过去"且主语为动作承受者。
3. 定语从句（where / who）
where all those ... had lived；who died；who drank this water。注意 where 在句中作地点状语，who 作主语。
4. 同位语
a British doctor, John Snow，逗号隔开的两词同指一人，后者解释前者的具体身份。
5. 并列与转折（but / however）
It was correct, but he still needed proof；However, cholera is still a problem。however 常置于句首表转折。
6. 非谓语动词（不定式 / 动名词）
to explain how ...（目的）；by marking ...（方式）；using maps and statistics ...（动名词短语作主语）。
七、逻辑链
引子（第1段）：霍乱曾是最可怕疾病 → 斯诺登场，展示可战胜
↓
背景（第2—3段）：19世纪霍乱肆虐、死伤惨重，斯诺立志"彻底消灭"
↓
假设（第4段）：当时有两种病因理论，斯诺选定"细菌/水源说"并着手调查
↓
取证（第5—6段）：地图标记锁定宽街水泵 → 幸存者不喝泵水 → 证实水源被污染
↓
成效（第7段）：推动清洁供水，全球霍乱威胁下降
↓
余思（第8段）：霍乱仍未绝迹，但"地图+统计"的方法沿用至今
这是一篇"问题—调查—结论—意义"的科技/人物记叙文：第1—3段铺垫 cholera 之危害与斯诺之决心；第4—6段是核心，用"理论假设→实地取证→水污染结论"的逻辑展开科学探究；第7—8段收束于成效与现实意义。
八、写作迁移
模板 1：However, he never lost his desire to ...
课文：However, he never lost his desire to destroy cholera once and for all.
仿写：However, she never lost her desire to pursue her dream once and for all.（然而，她从未放弃彻底追寻梦想的愿望。）——用于转折后强调坚持。
模板 2：In general, ... had two contradictory theories to explain ...
课文：doctors had two contradictory theories to explain how cholera spread.
仿写：In general, scientists have two contradictory theories to explain the origin of the universe.（总的来说，科学家对宇宙起源有两种对立理论。）——用于引出不同观点。
模板 3：... began by doing ...
课文：Snow began by marking on a map the exact places ...
仿写：He began by collecting data from hundreds of cases.（他首先收集了数百个案例的数据。）——用于描述研究/行动的第一步。
模板 4：Through one’s tireless efforts, ...
课文：Through Snow’s tireless efforts, water companies began to sell clean water.
仿写：Through his tireless efforts, the team finally developed a new vaccine.（经过不懈努力，团队终于研制出新疫苗。）——用于说明付出带来成果。
模板 5：Moreover, using ... to solve ... is a common method in ...
课文：using maps and statistics to solve real-world problems is a common method in public health research.
仿写：Moreover, using big data to solve traffic problems is a common method in smart cities.（此外，用大数据解决交通问题已成为智慧城市的常用方法。）——用于结尾升华方法价值。
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