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我们人类已知存在了数千年

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仅仅看向我们周边的环境

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那里有不同的物质

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而这些不同的物质往往

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有不同的特性

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不仅它们有不同的特性

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一种可能以某一特定的方式反射光

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或不反射光，或特定的颜色，或

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在某一特定温度，成为液体或气体或固体

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但我们已开始观察它们如何

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在某些环境下相互反应

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而且这里是一些这些物质的图片

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在这里的是碳

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并且这里是它的石墨形式

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这个是铅

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这个是黄金

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并且还有我展示过的所有照片，在这里——

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我从这个网站中获得它们，就在这里——

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它们都处于其固体状态

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但我们也知道它看上去像

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某些类型的空气和某些类型的空气颗粒

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并且取决于何种种类的空气颗粒

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你正看着它，无论是碳或氧或氢

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似乎有不同种类的特性

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或者是还有其他可以是液体的东西

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或你将这些东西的温度升至足够高

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你可以做到，如果你将其温度升至足够高

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对金或对铅，你可以得到（它们各自的）液体形式

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或者你点燃这些碳

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你可以使它变成气态

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你可以将之释放至大气层

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你可以打破它的结构

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所以这些是我们拥有的所有，有点，人性化

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已观察了数千年

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但这影响了一个自然问题

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（它）曾经是一个哲学问题

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但现在我们可以更好一点地回答它

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并且那个问题是，如果你持续分解这些碳

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至小之又小的块，有

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这些东西的最小的块，最小的单元，

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对于这个物质而言，始终有碳原子的特性吗？

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如果你要，不知何故地，持续打破它

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不知如何，你将

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失去碳的这些特性

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然后答案是，这就是。

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所以只是为了得到我们的术语

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我们称这些不同的物质——

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这些有其特定特性的纯净的物质

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在特定的温度和特定的反应条件下

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我们将之称作元素

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碳是一种元素

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铅是一种元素

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金是一种元素

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你可能说水是一种元素

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并且在历史上，人们将水当作元素

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但现在（我们认为）水是由更多基础的元素构成的

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是由氧元素和氢元素

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并且我们所有的元素都在元素周期表里列出了

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C 代表碳——我只想通过那些

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与人类息息相关的（元素），且随着时光流逝，你可能会逐渐熟悉这里所有的元素

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这是氧

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这是氮

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