The arctica is known for its extreme cold and unique wildlife.

北极地区以其极端的寒冷和独特的野生动物而闻名。

Many species in the arctica are adapted to the harsh conditions.

北极地区的许多物种都适应了恶劣的环境条件。

Scientists are studying the effects of climate change in the arctica.

科学家们正在研究气候变化对北极地区的影响。

The arctica is home to the polar bear, one of the most iconic animals.

北极地区是北极熊的家园，北极熊是最具代表性的动物之一。

The melting ice in the arctica is a major concern for environmentalists.

北极地区的冰层融化是环保人士关注的重大问题。

Another oceanic resident, the quahog clam (Arctica islandica), is thought to be one of the longest lived metazoans of all.

另一位海洋居民—圆蛤被认为是世界上最长寿的后生动物。