Four specific activities have been identified as major contributors to the desertification processes: over-cultivation, overgrazing, firewood gathering, and over-irrigation.
四项具体活动已被确定为对荒漠化的主要导致的过程：过度农垦，过度放牧，薪柴采集和过度灌溉。
2
If I were to live my life over again, I would pay more attention to the cultivation of the memory.
假如我现在能重新开始我的生命，我就要更注意记忆力的培养。
3
Over-exploited water resources, deforestation and inappropriate cultivation of grasslands have dried up lakes and eroded soil.