"Dolphin" 用英语说是 "dolphin". "It's dancing" 就是 "它在跳舞"，在英语中就是 "It's dancing."
来源："Dolphin" 这个词来自希腊语 "delphus"，意为“海豚”。
英文例句：
The dolphins were leaping out of the water and playing in the waves.
The dolphin show at the aquarium was amazing.
I swam with the dolphins at the marine park.
中文翻译：
海豚在水中跃跃欲试
水族馆的海豚表演真是太棒了
我在海洋公园里和海豚游泳.