Běi / jí / dì / qū / de / dà / bù / fèn / dòng / yuán / yì / nián / zhōng / yǒu / hěn / cháng / shí / jiān / bèi / bīng / xuě / fù / gài

北极地区的大部分冻原一年中有很长时间被冰雪覆盖。

Much of the Arctic tundra is covered in ice and snow for a long time each year.