北极

数月shùyuè后hòu，牠们men回到huídào了le北极běijí的de繁殖fánzhí地de。

A few months later they return to their breeding grounds in the Arctic.

北极běijí与yǔ南极nánjí的de温度wēndù不一样bùyīyàng。

The temperature at the North Pole is different from at the South Pole.

圣诞老人Shèngdàn Lǎorén住zhù在zài北极běijí。

Santa lives at the North Pole.

到dào北极běijí可不kěbu容易róngyì。

To reach the North Pole is not easy.