1. Bears go into hibernation during the winter months to conserve energy.
熊在冬季进入冬眠状态以节省能量。

2. Some animals, like squirrels, store food before hibernation to sustain themselves during the long sleep.
一些动物，比如松鼠，在冬眠之前储存食物，以在长时间的休眠期间保持生存。