Groundhogs spend the winter hibernating in a specially dug hibernation burrow, their breathing and heartbeats slowed to a snail'space.
土拨鼠在一个特别的冬眠洞穴中冬眠,它们的呼吸和心跳慢到和蜗牛差不多。
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Groundhogs spend the winter hibernating in a specially dug hibernation burrow, their breathing and heartbeats slowed to a snail'space, their body temperatures not too far above freezing.