active vocabulary knowledge

What developments occur in the three types of vocabulary knowledge (passive, controlled active and free active vocabulary knowledge) over one year of study?

经过一年的学习，三种词汇知识（主动词汇、半主动词汇和被动词汇）的增长态势如何；

Researches into vocabulary knowledge measurement develop along three main lines, i. e. the passive vocabulary size, the depth of vocabulary knowledge and free active vocabulary.

词汇知识测量的研究有三条主线，即消极词汇量，词汇知识深度和积极词汇知识。

To choose the right words, we should use them to express exactly what we want to say. It requires a large active vocabulary, and a basic knowledge of diction may be of help.

选用恰当的词汇，需要学会使用最常用的词汇以准确地表达自己，这就离不开丰富的词汇量，而了解措辞方面的基础知识对我们是很有裨益的。