海豚是聪明的动物。

The dolphin is an intelligent animal.

《牛津词典》

我最喜欢的动物是海豚和兔子。

My favorite animals are dolphins and rabbits.

youdao

友善的海豚是我最喜爱的动物。

The friendly dolphins are my favorite animals.

youdao

The history of the military in the United States and other countries includes a lot of attempts to get animals like pigeons or dolphins to do interesting and deadly things through various training.

各国在其军事史中,都有试图通过训练鸽子海豚等动物,去完成各种高难而致命任务的尝试。

耶鲁公开课 - 心理学导论课程节选