求托福词群答:Gregarious, swarm, flock, herd, mammal, carnivore, carnivorous, appetite, herbivorous, omnivorous, predator, predatory, prey, poikilotherm(变温动物,冷血动物), rodent, scavenger, microbe, reptile, homotherm(恒温动物), primate, mollusk, coelenterate, vertebrate, invertebrate, finch, bird, fowl, monste...