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- This is undoubtedly an once-in-a-lifetime opportunity to learn more about polar conservation and the severeness of climate change towards the polar area. 这是一个难能可贵的机会，一方面能探讨保护北极的问题，也能认识气候变化对北极的影响。
- Caption:: The dramatical phenomenon, is characterised by having a dashing luminance in the upper layer of the atmosphere, created by the collisions of energetic particles of solar wind with the atoms and molecules in the polar areas. 当太阳风被地球磁场引领至两极地区，与地球大气层的粒子发生碰撞时，便会形成极光，宛如一张色彩斑澜的轻妙扫过夜空，绚丽夺目。
- Are there any animals in the polar circles? 南极圈和北极圈内有动物存在吗？
- Although they can swim, the polar bears are terrestrial animals. 北极熊虽然会游泳，但也是陆栖动物。
- The polar bear's habitat is the icy waters of the Arctic. 北极熊的栖息地是冰冷的北极海域。
- I am steady as a rock-fixed as the Polar Star. 我坚定得象磐石，稳定得象北极星。
- Why does the polar Bear have white fur? 为什么北极熊毛是白的?
- The polar bears are white and large. 北极熊是白的,而且体型庞大。
- Why is the polar bear in danger? 北极熊为什么濒临灭绝的危险?
- I know the polar bear3 be from the Arctic4, too. 我还知道北极熊来自北极。
- Stop by the Polar Pit Cafe for some Hot Chocolate! 为一些热巧克力顺道拜访极的坑咖啡馆！
- Located or found in one of the Polar Regions. 环极的，围绕极地的位于或发现于一个极地区域中的
- The Arctic remains the domain of the polar bear. 北极仍是北极熊的领地。
- The polar region is the habitat of the polar bear. 北极地带为北极熊的栖息地。
- Permanently frozen subsoil, occurring throughout the Polar Regions and locally in perennially frigid areas. 永冻土永久冰冻的下层土壤，出现在整个北极地区和部分长期寒冷的地区
- Steve and Jack gave a talk about their trek across the Polar ice cap. It was very interesting but it made my hair stand on end just to hear about the dangers they faced. 史蒂夫和杰克讲述了他们在极地冰盖的一段艰苦跋涉，故事津津有味，只是听到他们遇到种种险情时，我吓得很。
- Noctilucent clouds are ragged extensions of a more widespread and more permanent layer which forms over the summer polar area at the mesopause. 夜光云是在夏季极地中圈顶之上形成的更广泛更持久的层的参差不齐的延伸。
- Extending across or crossing either of the Polar Regions. 横越极地任一个横越或穿过两个极地地区中的
- On the plus side, the solar storms promote the colorful auroras, known as the northern and southern lights, high in the sky over polar areas. 此外,太阳风暴会形成彩色极光,即我们所知的北极光和南极光,出现在极地高空。
- Keesh lived at the edge of the polar sea. 季奚住在北极海的边缘上。
