四级As one of the most brutal predators (食肉动物), killer whales may not fit the image of a cultured creature.

作为最残忍的捕食者之一(食肉动物), 虎鲸可能不符合养殖生物的形象。

考研This was not a volunteer soldier, not someone well paid, but an average guy, up against the best trained, best equipped, fiercest, most brutal enemies seen in centuries.

这不是一个志愿兵，不是一个高薪的人，而是一个普通人，面对着几百年来最训练有素、装备最好、最凶猛、最残暴的敌人。