A dolphin is a mammal.
The whale is a very large mammal which lives in the sea.
A bat is not a bird, but a mammal.
Whales are mammals.
Easter bunnies are an oviparous species in the mammal family of Leporidae.
The whale is not a fish but a mammal.
The mammal is dead.
A whale is no less a mammal than a horse.
A whale is a mammal; in other words it feeds milk to its young.
Dolly the sheep was the first big mammal to be cloned.
The blue whale is the largest mammal on Earth.
Even though it is huge and lives in the sea, the blue whale is a mammal.
Humans are mammals, just like chimpanzees and dogs.
The elephant's pregnancy is the longest of any mammal
The whale is well known to be the largest mammal.
English word "哺乳动物"(mammal) occurs in sets:动物 - the animal world