0 a region of the earth's surface and the particular combination of climate (= general type of weather), plants, and animals that are found in it: --
Tropical rainforest is a very complex biome.
1 a region of the Earth's surface and the particular combination of weather conditions, plants, and animals that are found in it --
We can complete it step by step however long the road is and it can't be completed however short the road is if you don't even mark your footprint.
We kunnen het stap voor stap voltooien, hoe lang de weg ook is en het kan niet worden voltooid, hoe kort de weg ook is, als je niet eens je voetafdruk markeert.