BanGen is a strange sights in the treestropical rainforest,which forms the roots of the bare outer plate. Tropical forests have the abundant precipitation and the moisture in the soil is saturated or nearly saturation in the long run and it goes against plant root respiration.And then plus the rainforests of trees are very tall,they need the developed root to support the trunk strength.While,the BanGen which is bare outer to spread around the growth can satisfy the tropical rain forest tree growth of this kind of demand.
这是我自己翻译的 可能不准 仅供参考