and form one of the most productive habitats on the planet. 成为地球上一处 最肥沃的野生动物栖息地
smooth-coated otters form family groups up to 17 strong. 印度水獭的一个家族可多达17名成员
here in their natural home they form great forests 它们在大自然中形成大片灌木林
Volcanoes form the backbone of the longest mountain chain on our planet - 火山构成了地球上最长山系的主干
They seem to form a cordon around the impala. 它们似乎打算对黑斑羚形成一个包围圈