noun 下载 🔗分享 鲸类动物,鲸目动物。 Whale-like mammals. Examples : "My daughter is learning about cetacea in her marine biology class, studying animals like whales and dolphins. " 我女儿在她的海洋生物课上正在学习鲸类动物 (例如鲸鱼和海豚)。 animal biology ocean nature 与AI对话词汇游戏阅读练习