12 篇文章
Harder still, how do you preen your body feathers?
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Harder still, how do you preen your body feathers? 更麻烦的是 要如何整理羽毛呢

The deeper the snow, the harder it is to detect prey,
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The deeper the snow, the harder it is to detect prey, 积雪越深越难发现猎物