the tundra-steppe became Earth's most extensive habitat. 冻原成为地球上最广阔的栖息地
could create a rich and extensive habitat, 就能打造一座茂盛而广阔的栖息地
The effect is so spectacular and so extensive 这种壮观的景象发生的地域之广
are the most extensive forests on Earth. 在地球上分布最为广泛