The result shows the frequency of the Ba-structure used b y the native speakers was only 30%, which indicates that some of the contexts ar e not natural contexts.

To construct the system,the key point is to make clear of the actual language situation,facing contradiction and developing trends.

Research on natural environmental test of anti-corrosion paint of amphibian armoured equipment;

The research on the acceleration rule of the natural environmental diversification;

A comparative study on the natural environment of the Yangtze River Xintankou -Luoshan and Tiane Zhou Baiji Dolphin National Natural Reserve;

On the basis of analysing the impact of hydropower projects in different size to nature environment, the impact trends of flow geography, water quality, mud and sand, zoology environment are concluded in order to provide references to impact assessment of other hydropower project.

The nature environment near the tall building hospital is rather bad.

Especially,the article focuses on two aspects,the first is the architectural emblem and symbol quality of school building,the second is the relationship of human environment and nature environment.

The affection of the natural environment on HF communication;

On the Environment s Influence on the Persian War;

The environment is the basis for human to liv e.