语言的材料是詞彙。詞彙是一种民族語的詞的总和。一种民族語,只能有一个詞彙。由于生产、物質生活和文化生活的發展情况不同,民族語的詞彙發展也各不相同。有的詞彙大些,丰富些;有的小些,貧乏些。对于一种民族語的詞彙,我們是只論它的大小,不論它的多少,因为一种民族語只有一个詞彙。一种民族語只有一个詞彙,包括这种民族語的集团里的人所使用的一切詞。可是,并不是任何人都能使用一切的詞,而且,事实上,也沒有一个人需要使用一切的詞。因此,各人所掌握的詞彙也有大小不同。小学生的词彙,此中学生小得多;科学家的詞彙里,有許多詞是农民的詞彙里所沒有的;詩人的詞彙 The language of the material is vocabulary. Vocabulary is the sum of words in a national language. A national language, only one word. Due to the different development of production, material life and cultural life, vocabulary development in ethnic languages ​​varies. Some words larger, more abundant; some smaller, poor. For a national language vocabulary, we are only about its size, no matter how much, because there is only one vocabulary of a national language. A national language has only one word, including all the words used by those in the group of ethnic languages. However, not everyone can use all the words, and in fact, no one needs to use all the words. Therefore, each person has different vocabulary. Pupils ’vocabulary, which is much smaller among middle school students; there are many words in the scientist’s vocabulary that are not found in the peasants’ vocabulary; the poet’s vocabulary