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　　In every cultivated language there are two great classes of words which, taken together, comprise the whole vocabulary.

　　First, there are those words __1__ which we become acquainted in daily conversation, which we __2__ ,that is to say, from the __3__ of our own family and from our familiar associates, and __4__ we should know and use __5__ we could not read or write.

　　They __6__ the common things of life, and are the stock in trade of all who __7__ the language.

　　Such words may be called“popular”, since they belong to the people __8__ and are not the exclusive __9__ of a limited class.

　　On the other hand, our language __10__ a multitude of words which are comparatively __11__ used in ordinary conversation.

　　Their meanings are known to every educated person, but there is little __12__ to use them at home or in the market-place.

　　Our __13__ acquaintance with them comes not from our mother's __14__ or from the talk of our school-mates, __15__ from books that we read, lectures that we __16__ ,

　　or the more __17__ conversation of highly educated speakers who are discussing some particular __18__ in a style appropriately elevated above the habitual __19__ of everyday life.

　　Such words are called“l(fā)earned”, and the __20__ between them and the“popular”words is of great importance to a right understanding of linguistic process.