Under the influence of different philosophical backgrounds, linguistic doctrines or researching paradigms of reseachers, the studies of lexical difficulty of second language were mainly carried out within the dimensions of statistical features and linguistic features.

The problem of lexical difficulty remains an open question, though scrutiny has already been given.

The goal of this study is to help the students solve the vocabulary problem, in order to develop an interest in English studying, set up confidence, cultivate good habits, and to form effective study tactic.

Halliday notes the employment of Grammatical Metaphor(GM) can enhance the Lexical Density(LD) while reduce the Grammatical Intricacy(GI).

Features explored include lexical density and nominalizations, both of which may affect the way information is packaged in academic English.

Pearson correlative analysis indicates that: the web-based environment promotes the overall frequent use of strategies;a positive cor- relation exists between vocabulary depth achievements and frequent use of manag.

This is a cross-sectional research on the developmental routes or characteristic patterns of L2 vocabulary depth(or knowledge) for Chinese EFL learners at three different proficiency levels.

The vocabulary size test was developed on the basis of Paul Nation s Vocabulary Levels Test, whereas vocabulary depth test.

First, it investigates productive vocabulary breadth in general.