柯林斯词典cetacean /sɪˈteɪʃən/ (cetaceans) 1. N-COUNT Cetaceans are animals such as whales, dolphins, and porpoises. 鲸类动物[usu pl] 返回 cetacean剑桥词典any of various types of mammal , such as the whale , that live in the sea like fish 鲸目动物 返回 cetacean