Arctic Circle 英文解释,还有Castle 的英文解释如：flat的解释：a group of rooms for living in. A flag is usually on one floor of a house or big building. 就这样解释,而且是英文的啊!一定啊!用英文来解释！ 还有，中文意思是什么呢？

Arctic Circle 北极圈
it is an area that in the north part and it is always cold,snowy.
Castle 城堡
the place where the king and the prince lived or a large ancient building

the zone that is 66 degree 33 north of north latitude

The Arctic Circle is an imaginary line drawn around the northern part of the world at approximately 66° North.
北极圈是人们在北半球大约北纬66度的地方假想出的一条线.
1
A castle is a large building with thick,high walls.Castles were built by important people,such as kings,in former times,especially for protection during wars and battles.
城堡是一幢有着高墙厚壁的建筑.城堡由一些重要任务建造,例如国王.古时候主要是用来在战争中起保护作用.
2
In chess,a castle is a piece that can be moved forwards,backwards,or sideways.
象棋中castle是能前后左右移动的一种棋子（车）.