This is a mysterious world, 这是一个神秘的世界

147. it rains so much that, for part of the year,
     由于降雨量特别大 一年中总有一段时间
148. the trees are almost totally submerged.
     树木几乎被完全淹没
149. The forest floor is 30 feet below the water's surface.
     水面至林地表层深达九米
150. This is a mysterious world,
     这是一个神秘的世界
151. a place few people have ever explored.
     鲜少有人踏足
152. We have much to discover
     这里分布的许多动物
153. about the animals for which this is home...
     都值得我们去探索

来自《行星地球 第二季 第三集 Planet Earth S02E03 丛林》第 150 行