【主旨】Flying和Gliding类型动物稀少的原因
【内容】主要描述动物，它们可以在树与树之间不断穿梭但不掉下来。文章试图解释为何它们只存在于south Asia的tropical forest，而在其他的地区相对来说都比较少，全文总共分析出三个可能的理由，大约是树很高啊，高度上参差不齐，藤条也很多，森林中还有很多有毒的植物，而动物必须去其他森林寻找食物之类的。
【Content】Describes the animal, they can constantly shuttling between the tree and the tree does not fall off.Article tries to explain why they only exist in South Asia's tropical forest, while in other areas are relatively small, which read out for a total of three possible reasons, around a tall tree, uneven heights, canes are many, there are many toxic plants in the forest, animals must go to the forest in search of food or something like that.
但要注意的是，在每一个理论之后作者深入分析了这种现象背后的原因。
【相关词汇】
Aerial locomotion 凌空行动
gliding v.滑翔
evolve v.发展进化
rain forest 雨林
predators 捕食者
prey v.捕食
stability n.稳定性
equilibrium angle 平衡角
turbulent condition紊流状态
erratic adj.不稳定的；古怪的
predictions n.预言；预测
