It is found that for non-English majors,both passive vocabulary and controlled active vocabulary progress,but free active vocabulary does not progress apparently.

Laufer put forward a method of dividing SLA learners vocabulary into passive vocabulary,controlled active vocabulary and free active vocabulary.

However,the results of some surveys suggest the college English majors acquire much more passive vocabulary than active vocabulary.

Starting from three different angles,such as the distribution,the number of the explained words and the relation between the explained words and the explaining words,the method classifies the phonomenon of different words with same enplanations.