Here on Earth, the influence of these vents 在地球上 这些喷口的影响范围
where life on Earth first began four billion years ago. 生命正是起源于类似这样的喷口
The ocean is home to 80% of all animal life on Planet Earth. 海洋是地球上80%动物的家园
the Planet Earth III team are welcomed by people 「行星地球 III」的摄制组受到了人们的欢迎
In this new series of Planet Earth... 在新一季的《行星地球》里
This densely built-up landscape is as unnatural as anywhere on Earth. 这座高楼林立的城市 与地球上许多地方一样远离自然