树形模型是表示一个语言家族的发展并显示两种或更多语言的密切相关程度的一种便捷方式。

The tree model is a convenient way of representing the development of a language family and of showing how closely related two of more languages are.

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但这一模型显然是非常简化的，即只用树上的一个分支来表示整个语言体系，不能公平对待该语言中的所有变体。

But it is obviously very simplified, having a whole language represented by just one branch on a tree doesn't really do justice to all the variations within that language.

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公司表示，需要一种通用语言作为新业务的交流语言，而英语是国际企业的主要语言，就成为显而易见的选择。

It says it needed a common language to communicate with its new operations, and English, as the chief language of international business, was the obvious choice.

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Syntax basically says, what are the legal expressions in this language?

语法也就是说，这个语言的合理表示是什么？

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For a language like English, that creature there is referred to with the morpheme "Dog."

对于像英语这样的语言,那种生物被表示为语素"狗"

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Let's choose Latin, the language of scholarship, and so iron became Fe for ferrum and lead became Pb for plumbum and gold is Au for aurum and so on.

那就选拉丁文吧，用于学术的语言，所以，iron就变成了Fe，表示铁元素,铅变成了，Pb，表示铅元素,金变成了Au，表示金元素，等等。

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