Often the only signs of life are what you hear. 只听到各种生物的鸣叫

5. But how do so many different kinds of plants and animals find the space here to live alongside one another?
   那么如此众多的动植物种类 是如何获得自己的生存空间的呢?
6. On the dark, humid forest floor
   在幽暗的森林地表上
7. the jungle appears to be lifeless.
   看上去毫无生气
8. Often the only signs of life are what you hear.
   只听到各种生物的鸣叫
9. A male blue bird of paradise is advertising for a mate.
   这只雄性蓝极乐鸟正在做征婚广告
10. It's quite a performance but he's not the only bird of paradise here keen to make an impression.
    它的表演很精彩, 不过它并不是唯一给人深刻印象的极乐鸟
11. There are nearly forty different kinds on the island of New Guinea
    在巴布亚新几内亚岛上大约有40种不同种类的极乐鸟

来自《行星地球 第一季 第八集 Planet Earth S01E08 热带雨林》第 8 行