winter hibernation造句怎么写

She-bears normally give birth to tiny walnut-sized cubs during their winter hibernation and suckle them for months as they grow, before the spring thaw awakens the mother and she leaves her den.

Here a grizzly bear forages in Denali's 6 million acres (2.4 million hectares), bulking up for its winter hibernation.

Bears wake up in the spring after a winter hibernation.

Wee found that polar bears — like their nearest relatives the brown bears — are incapable of reducing their metabolic rate to the level that we see during winter hibernation.