In the arid and poor mountain lands, shrubs are used to conserve soil, water and headwater and to improve ecological environment, which can not be replaced by any tree species.
在干旱瘠薄山地，灌木保持水土、涵养水源、改善生态环境等方面具有乔木树种不可代替的作用。
On the other hand, tourism has exerted great pressure on the environment we are living in: water is polluted, the ecological system is disturbed, and natural resources have been excessively used.
另一方面，旅游业已经对我们生存的环境造成了巨大的压力：水受到污染，生态平衡遭到破坏，自然资源被过度开发。
Tennant method is one of the method widely used on water demand of ecological environment.
田纳特法是目前广泛应用的生态环境需水量确定方法之一。
Tennant method is one of the method widely used on water demand of ecological environment.
田纳特法是目前广泛应用的生态环境需水量确定方法之一。
应用推荐