松鼠、北极熊的英文版资料（急）

Squirrels are quick and cheerful animals who spend their time scurrying, scavenging, and playing. They are often seen jumping happily from branch to branch up in the treetops. Squirrels are foragers searching for nuts and seeds, and they are social animals often seen chasing and playing with other squirrels.

The polar bear rivals the Kodiak bear as the largest four-footed carnivore on Earth and can live up to 25 years. Although the polar bear?s coat appears white, each individual hair is actually a clear hollow tube that channels the sun?s energy directly to the bear?s skin and helps it stay warm. The polar bear?s entire body is furred, even the bottom of its paws. That helps prevent bears from slipping on the ice. The polar bear is classified as a marine mammal. Its feet are partially webbed for swimming, and its fur is water-repellent. A formidable predator, it has extremely sharp claws. The entire circumpolar Arctic region is polar bear habitat. They are equally comf