Each autumn around October, the butterflies travel up to 3,000 kilometers south to spend winter.
每年秋天10月份左右，蝴蝶会向南迁徙到3000公里远的地方过冬。
Unless you spend winter in a remote Russian village where 'pechka' is the only warm place in the whole house.
除非你在遥远的俄罗斯村庄度过冬天，你才会发现‘pechka’是整个房间中唯一一个温暖的地方。
Each autumn, thousands travel up to 3,000km to spend winter in the mountains of Mexico.
每年秋季，成千上万只帝王蝶就飞行3,000多公里到达墨西哥境内的山脉过冬。
Pupa - Black swallowtails spend winter as chrysalids, emerging as butterflies when warm weather returns.
蛹期—黑燕尾蝶冬天时变身蝶蛹，气候回暖时破茧而出，变成蝴蝶。
Pupa - Black swallowtails spend winter as chrysalids, emerging as butterflies when warm weather returns.
蛹期—黑燕尾蝶冬天时变身蝶蛹，气候回暖时破茧而出，变成蝴蝶。
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