1. Bears hibernate in the winter.
熊在冬天会冬眠。
2. During hibernation, a bear's heart rate slows down.
冬眠期间,熊的心率会减慢。
3. Many animals hibernate during the cold season.
许多动物在寒冷的季节会冬眠。
4. Bears hibernate to get through the cold winter.
熊通过冬眠来度过寒冷的冬天。
5. Hibernation is an important survival strategy for bears.
冬眠是熊生存的重要策略。