0 a scientist who studies the behaviour of animals in their natural environment: --
The term courtship, as used by ethologists, refers to all the behavioural interactions of the male and female which lead up to the fertilization of an egg.
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.
Vi kan slutföra det steg för steg hur lång vägen än är och den kan inte slutföras hur kort vägen än är om du inte ens markerar ditt fotavtryck.