arid and semi-arid lands meaning in Chinese

干旱和半干旱地区

Arid and semi - arid lands
干旱和半干旱地区
There is a strong relationship between the vegetation cover and stability of oasis ecosystem which is the key location of mankind production and existence in arid and semi - arid land . the change of vegetation cover in arid and semi - arid has very important influence on the oasis eco - system , as it is very sensitive to the environment changes to oasis direction or to desert direction that the fluctuating index of vegetation cover . the vegetation cover rate change great effect on realizing the characteristic
植被覆盖度对于干旱区人类生存和生产核心场所的绿洲稳定有着直接的关系，在干旱区覆盖度的变化对本已脆弱的绿洲生态系统有着重要的影响，是向绿洲化还是向荒漠化的方向发展，十分敏感于绿洲植被覆盖度的指数，了解各类植被覆盖度的特征及演化规律，对认识干旱区生态环境的现状及发展趋势，辨识引起环境变化的驱动力，有着重要的意义。