北极比南极温暖，其周围的空气循环更为畅通。

The north pole is warmer than the south and the circulation of air around it is less well contained.

《柯林斯英汉双解大词典》

在北极和南极，只有两个季节。

At the North and South Pole, there are only two seasons.

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北极燕鸥是真正的长途迁徙者，它们在北欧沿海湿地筑巢，但会向南飞行数千英里，在南极洲度过欧洲的冬季。

Arctic terns, being true long-distance migrants, they nest in coastal wetlands of northern Europe but fly south for thousands of miles to spend the European winters in Antarctica.

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