你的文章看起来像专家写的么？（Does your article sound as if it was written by an expert?）
我想问的原因是，当某人写文章的时候自己知道他真正的主题，他们就会用一定的“利基词汇”（阿光注：专用名词？相关词汇？）。也就是说，他们会用相应的单词和短语准确定义文章的主题。
你可能读过我写过的一篇文章“利基词汇 -为什么内容贫乏的文章不能隐藏在谷歌”。在那篇文章中，你会看到你的文章，如果不包含其相关的词汇，在谷歌的长期排名中你很可能会不幸的排不上名。
你写的每一篇文章都会有自己的相关合适的词汇。
两篇介绍了类似主题的文章将分配相关词汇的百分比，但不是所有的将被分配。
让我们用同样的例子，在那篇文章 - 癫痫 - 看看在谷歌的网页如何使用相关词汇。
为了进行测试，我发现了一些使用Web Content Studio（阿光注：软件？）让“癫痫”谷歌排名前10页上的话。长期位居前10页的页面上经常出现这些话。这些都是我所说的主题字（或相关词汇），即词通常出现在文章写的一个话题。
下面是我发现的关于癫痫主题的词汇：
年龄，援助，防，脑，事业，孩子，控制，发展，诊断，饮食，医生，药物，癫痫，癫痫，导游，卫生，帮助，家居，信息，生酮，生命，生活，日志，医疗，药物，的一部分，计划，研究，扣押，无癫痫发作，癫痫发作，侧面，特殊的，支持，手术，症状，采取长期，测试时间，治疗，类型，单位，工作
我想要做的是检查不同的癫痫“相关词汇组”看，如果这些话出现一对夫妇。相关词汇组是：
1。治疗癫痫
2。生酮饮食
这两个术语是高度相关的癫痫（生酮饮食是一种饮食，可以帮助一些患者治愈癫痫）。既然他们都谈到癫痫，他们都应该包含了很多癫痫相关词汇。
首先，让我们来看看癫痫世界排名第一页的。以下是截图显示的头号排名的文章的主题的话，刚才我发现的以黄色突出显示：
在这里你只能看到文章的一小部分截图，因为它是相当长的，但我敢肯定，你会同意文章遍布主题词。
让我们用治疗癫痫排名第一的文章证明这一点：
我们再次看到散布在整个内容的主题词，正如我们所期望的，因为这篇文章是关于癫痫。
让我们来看看最后一个例子，生酮饮食：
与癫痫相关的词汇遍布文章。
由于所有这些文章与癫痫相关词遍布文章，他们可以在搜索癫痫保持很好的排名，但最重要的是，谷歌就会知道文章是关于癫痫病，因为它们含有与癫痫相关的单词和短语。
每篇文章实际上有一个略有不同的主题的话，帮助他们正在讨论哪些方面的癫痫定义。我们可以证明通过寻找特定的三篇文章的主题的话，我们会看到他们是不同的（尽管会有癫痫相关的词语的核心）。
然而，让我们尝试的东西有点不同。让我们来看看在第二次测试。
测试2 - 我发现“主题短语” - 2，3及4字三个方面排名最高的10页 - 癫痫病治疗，生酮饮食与癫痫是常见的词组，发现了一些。
我汇集所有这些短语放在一起，然后检查网页排名前三名为癫痫，癫痫的治疗，生酮饮食。
如果每篇文章都有一个稍微不同的相关词汇，那么我们应该可以看到不同主题的词组被用在每一篇文章。让我们先看看癫痫文章：
短语标为蓝色。
这里是一个发现癫痫文章主题词组列表：
在大脑中的活动
阿特金斯饮食
血糖
癫痫病的原因
癫痫药物
癫痫药物
癫痫手术
生酮饮食
大脑的一部分
没收药品
颞叶
迷走神经
让我们重复测试，使用排名第一的治疗癫痫文章：
下面是排名靠前的网页治疗癫痫的主题短语：
不利影响
发作援助
抗惊厥药
抗惊厥药物
抗癫痫药物
抗癫痫药物
抗惊厥药物
控制癫痫发作
癫痫控制
癫痫发作
生酮饮食
控制癫痫发作
惊厥药物
颞叶
治疗癫痫
治疗癫痫
最后那句“生酮饮食”，这里有主题的短语：
这些短语：
抗惊厥药
抗惊厥药物
β-羟酸
体内脂肪
控制发作
控制癫痫发作
饮食控制癫痫发作
不同的抗惊厥药
高脂肪
这些短语：
抗惊厥药
抗惊厥药物
β-羟酸
体内脂肪
控制发作
控制癫痫发作
饮食控制癫痫发作
不同的抗惊厥药
高脂肪
高脂肪的饮食
高脂肪的摄入量
儿童医疗
蛋白质和碳水化合物
控制癫痫发作
癫痫发作类型
治疗癫痫发作
而在饮食
让我们来比较表中的这三篇文章的主题词组：
癫痫
癫痫治疗
生酮饮食
在大脑中的活动
阿特金斯饮食
血糖
癫痫病的原因
癫痫药物
癫痫药物
癫痫手术
生酮饮食
大脑的一部分
没收药品
颞叶
迷走神经
不利影响
发作援助
抗惊厥药
抗惊厥药物
抗癫痫药物
抗癫痫药物
抗惊厥药物
控制癫痫发作
癫痫控制
癫痫发作
生酮饮食
控制癫痫发作
惊厥药物
颞叶
治疗癫痫
治疗癫痫
抗惊厥药
抗惊厥药物
β-羟酸
体内脂肪
控制发作
控制癫痫发作
饮食控制癫痫发作
不同的抗惊厥药
高脂肪
高脂肪的饮食
高脂肪的摄入量
儿童医疗
蛋白质和碳水化合物
控制癫痫发作
癫痫发作类型
治疗癫痫发作
而在饮食
此表清楚地表明，三篇文章有不同的相关词汇。
正如我们上面看到的所有三篇文章有癫痫有关的主题的话，我们希望。但是每一篇文章也有自己的一套主题的短语有助于区分实际的分众内癫痫。
癫痫文章具有广泛的有关癫痫的各个方面的主题词组。
治疗癫痫文章更侧重对词组都涉及到治疗癫痫（大惊喜吧？）。
生酮饮食的文章有更多的主题饮食本身和控制癫痫发作有关的短语。
The reason I ask is that when an article is written by somebody who really knows their subject, they will use a certain "niche vocabulary". That is, they will use words and phrases that actually define the topic of the article.
You can read an article I wrote on this called “Niche Vocabulary - why poor content can't hide in Google”. You will see in that article, that if your article does not contain its niche vocabulary, you're very unlikely to rank in Google for the long term.
Every article you write will have its own niche vocabulary.
Two articles on a similar topic will share a percentage of that niche vocabulary, but not all of it will be shared.
Let's take the same example used in that article – epilepsy - and have a look at how the pages in Google use the niche vocabulary.
To carry out a test, I found a number of words on the top 10 pages of Google ranking for the term epilepsy using Web Content Studio. These words appeared on many of the top 10 pages ranking for that term. These are what I call theme words (or niche vocabulary), i.e. words that commonly appear in articles that are written about a topic.
Here are the theme words I found for the term epilepsy:
age, aid, anti, brain, cause, children, control, develop, diagnosis, diet, doctor, drugs, epilepsy, epileptic, guide, health, help, home, information, ketogenic, life, living, log, medical, medications, part, plan, research, seizure, seizure-free, seizures, side, special, support, surgery, symptoms, take, term, test, time, treatment, types, unit, work
What I would like to do is check a couple of different epilepsy “sub-niches” to see if these words appear. The sub niches are:
1. epilepsy treatment
2. ketogenic diet
Both of these terms are highly related to epilepsy (the ketogenic diet is a diet that helps cure epilepsy in a number of patients). Since they are both talking about epilepsy, they both should contain a lot of the epilepsy niche vocabulary.
First let's have a look at the top ranking pages for the term epilepsy. Here is a screenshot showing the number one ranked article with the theme words I found earlier highlighted in yellow:
You can only see a small section of the article here, as it's quite long, but I'm sure you'll agree that theme words are well sprinkled throughout.
Let's repeat this but using the number one ranked article for that term epilepsy treatment:
Once again we see the theme words sprinkled throughout the content as we would expect, since this article is also about epilepsy.
Let's look at the final example that the ketogenic diet:
This too has the theme words for epilepsy sprinkled throughout.
Since all of these articles have epilepsy theme words sprinkled throughout them, they could all theoretically rank for the term epilepsy, but the most important thing is that Google will know the article is about epilepsy because they contain epilepsy-related words and phrases.
Each of these articles actually have a slightly different set of theme words which help to define what area of epilepsy they are discussing. We could show this by finding theme words specific to each of the three articles and we would see they were different (though there would be a core of epilepsy related words).
However, let’s try something a little different. Let’s look at a second test.
Test 2 - I found a number of “theme phrases” – 2, 3 & 4 word phrases that are common to the top 10 ranked pages for the three terms – epilepsy treatment, ketogenic diet & epilepsy.
I pooled all of these phrases together and then checked the top three ranking pages for epilepsy, epilepsy treatment, and the ketogenic diet.
If each article has a slightly different niche vocabulary, then we should see different theme phrases being used in each of the articles. Let's have a look at the epilepsy article first:
The phrases are marked in blue.
Here is a list of theme phrases found in the epilepsy article:
activity in the brain
atkins diet
blood sugar
causes of epilepsy
epilepsy medication
epilepsy medications
epilepsy surgery
ketogenic diet
part of the brain
seizure medicines
temporal lobe
vagus nerve
Let’s repeat the test using the top ranking article for epilepsy treatment:
Here are the theme phrases on the top ranked page for epilepsy treatment:
adverse effects
aid for seizures
anticonvulsant drug
anticonvulsant drugs
anti-epileptic drug
anti-epileptic medications
anti-seizure medications
controlling seizures
epileptic control
epileptic seizures
ketogenic diet
seizure control
seizure medications
temporal lobe
treatment of epilepsy
treatments for epilepsy
And finally for the phrase “ketogenic diet”, here are the theme phrases:
These are the phrases found:
anticonvulsant drug
anticonvulsant drugs
beta hydroxybutyric acid
body fat
control of seizures
control seizures
diet controls seizures
different anticonvulsants
high fat
These are the phrases found:
anticonvulsant drug
anticonvulsant drugs
beta hydroxybutyric acid
body fat
control of seizures
control seizures
diet controls seizures
different anticonvulsants
high fat
high fat diet
high fat intake
medical treatment for children
protein and carbohydrate
seizure control
seizure type
treatment of seizure
while on the diet
Let’s compare the theme phrases of these three articles in a table:
Epilepsy
Epilepsy Treatment
Ketogenic Diet
activity in the brain
atkins diet
blood sugar
causes of epilepsy
epilepsy medication
epilepsy medications
epilepsy surgery
ketogenic diet
part of the brain
seizure medicines
temporal lobe
vagus nerve
adverse effects
aid for seizures
anticonvulsant drug
anticonvulsant drugs
anti-epileptic drug
anti-epileptic medications
anti-seizure medications
controlling seizures
epileptic control
epileptic seizures
ketogenic diet
seizure control
seizure medications
temporal lobe
treatment of epilepsy
treatments for epilepsy
anticonvulsant drug
anticonvulsant drugs
beta hydroxybutyric acid
body fat
control of seizures
control seizures
diet controls seizures
different anticonvulsants
high fat
high fat diet
high fat intake
medical treatment for children
protein and carbohydrate
seizure control
seizure type
treatment of seizure
while on the diet
This table clearly shows that each of the three articles have a different niche vocabulary.
As we saw above all three articles have theme words relating to epilepsy as we would expect. However each of the articles also had their own set of theme phrases which help to distinguish the actual sub-niche within epilepsy.
The epilepsy article has a wide range of theme phrases relating to all aspects of epilepsy.
The epilepsy treatment article focused more on phrases that are related to the treatment of epilepsy (big surprise eh?).
The ketogenic diet article had more theme phrases relating to the diet itself and the control seizures.
