Its body was dark gray, but its limb feathers were white with black tips.

它的翼膀和肢臂处则是翼尖黑色的白羽毛。

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The oil in a duck's feathers repels the water from its body.

鸭子羽毛上的油使其身体不沾水。

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The oil in a duck's feathers repels the water from its body.

鸭子羽毛上的油使其身体不沾水。

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