海豚也非常聪明用英语怎么说？

Dolphins are very intelligent,too.

Dolphin is very smart as well.

海豚 [简明汉英词典]
dolphin
porpoise
sea hog
sea pig
聪明 [简明汉英词典]
acumen
aptitude
becility
brightness
perspicacity
understand trap

The dolphin is (Dolphins are) very smart as well

Dolphins are also clever.