graved

Ethnic books are an important department of book markets . Because of their special academic values and limited marketing , the production and marketing of ethnic kooks have graved contradictions .

民族类图书是我国图书市场中的一个重要组成部分，但由于其特殊的学术价值及有限的市场销售，使得民族图书的制作及销售产生了较为严重的矛盾。

The main results are as follows : ( 1 ) Disturbance changes the soil physical structures , which result in the increase of soil capacity and graved content whereas the decrease of moisture content as well as porosity .

主要研究结果如下：（1）干扰改变了土壤物理结构，导致土壤容重、石砾含量增加，含水率、孔隙度降低。

In the latest 30 years , all the great environmental problems such as that atmospheric temperature increasing and continuing drying graved day by day and that circulation of organism and energy and water worsened greatly were related with chemical pollutions .

近30年来日趋严重的全球性气温升高、持续干旱，生物循环、能量循环、水循环发生恶化等重大问题均与化学污染有关。