This means that snakes fulfill roles as both predators and prey in regional food chains.
(This; means; that snakes fulfill roles as both predators and prey in regional food chains) Context(This means,List([0, 10))):(snakes; fulfill; roles as both predators and prey in regional food chains)
This means,List([0, 10))
This snakes
means fulfill
that snakes fulfill roles as both predators and prey in regional food chains
roles as both predators and prey in regional food chains