Complex sentence: Capable of explosive bursts of speed when launching an attack from the water, many species of crocodile are also capable of fast land-movement in explosive charges that can carry them nearly as quickly as a running human.
Split into simpler sentences: Capable of explosive bursts of speed when launching an attack from the water, many species of crocodile are also capable of fast land-movement. Many crocodiles are capable of explosive charges that can carry them nearly as fast as a running human.