英语翻译Throughout history,people have been interested in knowin

英语翻译
Throughout history,people have been interested in knowing how language first began,but no one knows exactly where or how this happened.However,we do know a lot about language,the language of today and also the language of earlier times.There are probably about three thousand languages in the world today.Chinese is the language with the most speakers.English,Russian and Spanish are also spoken by many millions of people.On the other hand,some languages in the world have less than one hundred speakers.
There are several important families of languages in the world.For example,most of the languages of Europe are in one large family called Indo-European.The original（最初的）language of this family was spoken about 4500 years ago .Many of the present-day languages of Europe and India are modern forms of the language of 4500 years ago.
Languages are always changing.The English of today is very different from the English of 500 years ago.In time,some even die out completely.About 1000 years ago English was a little-known relative of German spoken on one of the borders of Europe.
If a language has a large number of speakers,or if it is very old,there may be differences in the way it is spoken in different areas.That is,the language may have several dialects.Chinese is a good example of dialect differences.Chinese has been spoken for thousands of years by many millions of speakers.The differences between the dialects of Chinese are so great that speakers of Chinese from some parts of China cannot understand speakers from other parts.

贯穿历史,人们对了解语言最初如何产生充满兴趣已久,但是没有人确切知道语言是在何地以何种方式产生的.然而,我们的确对语言了解甚多——现今的语言与早日的语言.当今世界上大约有3000种语言,汉语是使用人数最多的语言.英语、俄语与西班牙语也有数百万的使用者.另一方面,有些语言在全球也只有不到100名使用者.
世界上有几大重要语系（family）.举个例子,绝大多数欧洲语言都属于一个名为印欧语系（Indo-European）的庞大语系.这种语系的最初语言早在4500多年前就已被使用.许多欧洲和印度的当今使用语言就是4500多年前的那种语言的现代形式.
语言总在改变.500年前的英语和今天的英语就千差万别,有些（语言）甚至完全消失了.1000年前左右,英语只是一个欧洲边境上与德语相关的被知之甚少的小语种.
如果一种语言有大量的使用者,或者说它有悠久的历史,那么这种语言在不同地区里有不同的使用方式.这就是：一种语言可能有多种方言（ dialects）.中国就是一个方言差异的绝佳例子.中文已被数百万人使用了上千年,其方言差异甚至巨大到中国某些地域的人们完全无法理解另一些地域的人们的话.