has so little nutritional value 但是竹叶没有太多营养价值

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  1. Most other bears would be sleeping underground by now,
    现在其它大部分熊都已躲在地下睡大觉
  2. but the giant panda can't fatten up enough to hibernate.
    可是大熊猫没能储备足够的脂肪冬眠
  3. Its food, bamboo, on which it totally relies
    它完全依赖竹子为生
  4. has so little nutritional value
    但是竹叶没有太多营养价值
  5. that it can't build up a store of fat like other bears.
    所以它无法像别的熊那样积累起脂肪
  6. Most of the creatures here move up or down the slopes with the seasons
    这里的大部分动物 都随着季节变化上下迁移
  7. but the panda is held captive by its diet
    只有大熊猫因为食物始终逗留此地

来自《行星地球 第一季 第二集 Planet Earth S01E02 山地》第 237 行

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