noun 下载 🔗分享 虎鲸,逆戟鲸 A sea mammal (Orcinus orca) related to dolphins and porpoises, commonly called the killer whale. Examples : "While whale watching in Alaska, we saw a pod of orcas hunting for salmon. " 在阿拉斯加赏鲸的时候,我们看到一群虎鲸正在捕猎鲑鱼。 animal ocean biology nature 与AI对话词汇游戏阅读练习