对林地和休耕林地的精确划分有时是不大可能的.Accurate separation between forest and forest fallow may not always be possible.我们班正在研究小面积林地的生物承载量.Our class is studying the carrying capacity of small forests.大多数情况下成年叶猴都在林地的树冠上采食树叶.Adult langurs s...