The returnees were now pooling their labour and resources to reclaim their fields.返回家园的人们正把劳力和财力集中起来开垦土地。Prehistoric peoples settled the area and began to cultivate the land.史前先民在这一地区安顿下来后开始开垦土地。The land could be reclaimed without detriment to conservation.可以在不危害环境的情况下开垦土地。