灌木的大小增加了，以及灌木的覆盖范围扩展到以前没有灌木的苔原上。
The size of the shrubs has increased and shrub cover has spread to what was previously shrub-free tundra.
如今，除了受到高栅栏保护的公园和灌木丛之外，这个小镇上已经没有一点植被。
The town has been browsed bare of vegetation, except where gardens and shrubs are protected by high fences.
人口不断增加所带来的压力促使人们大量砍伐木本植物，因此许多城市和城镇周围的大片地区已经完全没有树木和灌木了。
The increased pressures of expanding populations have led to the removal of woody plants, so that many cities and towns are surrounded by large areas completely lacking in trees and shrubs.
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