arctic和north pole区别

　　Brittleness remains a problem when building steel structures in cold conditions, such as oil rigs in the Arctic.

　　钢的易脆性在寒冷条件下建造钢结构，如在北极建造石油钻井平台时，仍然是一个问题。

　　The North Pole has no land, only thick ice.

　　北极没有陆地,只有厚厚的冰。

　　Although conditions were very poor, people tried for many centuries to reach the North Pole.

　　尽管条件很差，但几个世纪以来，人们一直在尝试抵达北极。