对北美人来说，知更鸟只在南方过冬。
To North Americans, the robins simply vacation in the south each winter.
在北美洲，知更鸟每到冬天会在南方度假。
To North Americans, the robins simplyvalternating currentation in the south ealternating currenth winter.
在北美洲，知更鸟每到冬天会在南方度假。
To North Americans, the robins simplyvalternating currentation in the south ealternating currenth winter.
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