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For some animals, sleeping is the best way to survive the hungry winter days. Chipmunks, squirrels, hedgehogs and some bears eat as much as they can in the autumn, then sleep somewhere safe until springtime.
1. survive：存活
2. Chipmunk [ˈtʃɪpˌmʌŋk] ：花栗鼠
3. squirrel [ˈskwɜ:rəl] ：松鼠
4. hedgehog [ˈhedʒhɔ:g] ：刺猬
