海豚用英语翻译为 "dolphin". 来源于希腊语 "δελφίς" (delphus)，意思是 "鲸鱼"。例句：

The dolphin is a marine mammal.

(海豚是一种海洋哺乳动物。)

The dolphin is known for its intelligence and playful behavior.

(海豚以智慧和欢快的行为而闻名。)

The dolphin is a popular attraction at many aquariums.

(海豚是许多水族馆的游客吸引力。)