0 a process in which animals, for example bats (= small animals with wings that fly at night), find their way in the dark by producing sound waves that echo (= are heard again) when they are reflected off an object: --
Dolphins locate underwater creatures using echolocation.
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.