外刊精读 | 考研英语素材:维生素 D 到底要不要补,三大试验给了同一个答案
- 2026-11-04 17:33:26
一、背景速览
秋分过后日照渐短，维生素 D 补充剂跟着进入旺季。这东西的理论底子很硬：缺乏会导致佝偻病，受体遍布全身，上世纪 80 年代还发现美国北方各州的癌症死亡率明显高于日照充足的南方。但三项大型人体试验（美国的 VITAL、澳大利亚的 D-Health、新西兰的 ViDA）跟踪数万人多年，没测出任何好处；2022 年《新英格兰医学杂志》的综述也确认，它对癌症、心脏、跌倒、认知、感冒和骨折一概无效。作者提醒：最低量是必需的，额外补未必有益，高纬度居民、深肤色者、长期室内工作者和饮食摄入不足的人冬天才可能需要。
二、英文节选
A summary editorial, published in 2022 in the New England Journal of Medicine, noted that vitamin D seemed to have no effect on cancer risk or heart health, another hoped-for benefit. It did not prevent falls, boost the brain or stave off the sniffles. Researchers found no beneficial effects even in people considered mildly deficient. Despite the link to rickets, the supplements also failed to reduce the risk of bone fractures.
The failure is a useful reminder that, despite centuries of research, the human body is sufficiently complicated that medics can at best make only educated guesses about exactly what a new drug or supplement will do to those who take it. Sometimes those guesses are wrong. There is still no substitute for just giving the drug in question to a lot of people and looking carefully at what happens.
三、中文译文
2022 年《新英格兰医学杂志》上一篇综述性社论指出，维生素 D 对癌症风险和心脏健康似乎都没有作用，而后者本是人们期待的又一项好处。它没防住跌倒，没提升脑力，也没挡住鼻塞感冒。即便在被认为轻度缺乏的人身上，研究者同样没发现任何益处。虽然与佝偻病有关联，补充剂却也没能降低骨折风险。
这次落空是个有用的提醒：尽管研究了几个世纪，人体依然复杂得让医生至多只能做有根据的猜测，去推断某种新药或补充剂到了服用者身上究竟会怎样。这些猜测有时候会错。要想知道答案，说到底还是只能把这种药交给一大批人服用，再仔细看会发生什么，此外别无办法。
四、高频词短语
【stave off】 /steɪv/ v. 挡开，延缓（不利的事）
例句：No supplement has been shown to stave off winter colds in healthy adults.
译：还没有哪种补充剂被证明能让健康成年人躲过冬天的感冒。
【educated guess】 /ˈedʒukeɪtɪd/ n. 有根据的推测 例句：Without trials, doctors can only make an educated guess about who will benefit. 译：没有试验，医生只能对谁会受益做个有根据的推测。
【deficient】 /dɪˈfɪʃnt/ a. 缺乏的，不足的
例句：The trials tested people who were only mildly deficient, not those with a real shortage.
译：这些试验测的是轻度不足的人，而不是真正缺乏的人。
【substitute】 /ˈsʌbstɪtjuːt/ n. 替代物；v. 代替
例句：There is no substitute for testing a drug on large groups of people.
译：要验证一种药，没有别的办法可以替代大规模人群试验。
【rickets】 /ˈrɪkɪts/ n. 佝偻病
例句：Vitamin D deficiency once made rickets a common childhood disease.
译：维生素 D 缺乏曾使佝偻病成为儿童常见病。
五、长难句速拆
原句：The failure is a useful reminder that, despite centuries of research, the human body is sufficiently complicated that medics can at best make only educated guesses about exactly what a new drug or supplement will do to those who take it.
主干短得只剩 The failure is a useful reminder，后面一长串都是 reminder 的内容。卡人的是中间嵌了两层：先是一个 despite 短语作让步，意思是「研究了几百年也白搭」；接着是 sufficiently complicated that…，这里不是常见的 so…that，而是用 sufficiently 搭配 that 引出结果，说人体复杂到某个程度，以致医生最多只能做有根据的猜测。guesses 后面还有两处接力：about exactly what… 交代猜的是什么，those who take it 里的从句修饰 those，指服用它的那批人。顺着读容易漏掉的是 at best，意思是「顶多」，它把医生的判断力压得很低，也是作者态度的落点。
六、考场应用
考研翻译·并列否定：It did not prevent falls, boost the brain or stave off the sniffles. 三个动词并列，最后一个用 or 收尾。这里的 or 不是「或者」，而是全盘否定的一部分，中文得说成「没防住……没提升……也没挡住……」才顺。考研翻译遇到三项并列加否定，先数清并列项，再定否定词落在哪。
考研与雅思写作·方法论句：There is still no substitute for just giving the drug in question to a lot of people and looking carefully at what happens. 这句把「理论再漂亮也得靠试验验」讲得很干脆。雅思 Task 2 谈决策该不该听专家的，或考研写作谈实证，都能化用 There is no substitute for doing sth 这个框架，比空喊 practice matters 有力。
雅思阅读·科普文结构：全文把「期待」和「结果」摆成对照，前面铺足理论，到第五段一句 But despite what the theory said, practice had other ideas 直接掉头。这种「理论—试验—落空」的骨架是段落主旨题的常考走向，看到 despite 引出的转折，就该知道接下来是全文重心。
试译：A series of influential studies in the 1980s found that deaths in America from several kinds of cancer were significantly more common in northern states than sunny southern ones, and proposed vitamin D as the explanation.
这句你打算怎么翻？提示：and 后面那个 proposed 前面省了主语，要自己补回去；than 后面的 ones 指什么，也想清楚再落笔。
七、来源
来源：The Economist ｜ 2026 年 9 月 26 日刊
更多往期内容👇
外刊精读 | 考研英语素材：植物奶卖不动了，牛奶重新爬回购物车
