您要查找的是不是：
- The two systems of government are polar opposites. 这两种政体正好相反。
- metamorphic polarity 变质极性
- Most insect do not live in polar region. 大多数的昆虫不在极地地区生存。
- Are there any animals in the polar circles? 南极圈和北极圈内有动物存在吗？
- 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
- In spite of vigilance a polar bear escape from the zoo. 尽管警戒很严，北极熊还是逃出了动物园。
- The layered structure common to metamorphic rocks. 叶理象变质岩一样的岩石层状结构
- The polar region is the habitat of the polar bear. 北极地带为北极熊的栖息地。
- Metamorphic rock having porphyritic texture. 残斑岩具斑岩状结构的变质岩。
- Can eunuch become metamorphic operation? 太监能做变性手术吗?
- Note the polarity of the voltage drop across R. 注意R上电压降的极性。
- 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。
- In spite of vigilance a polar bear escaped from the zoo. 尽管警戒很严，北极熊还是逃出了动物园。
- 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。
- Love and hatred are polar feelings. 爱与恨是完全相反的感情。
- 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
- A polar bear has a preference for cold weather. 北极熊喜欢寒冷的天气。
- Alaska still is a land of iceberg and polar bear. 阿拉斯加现在仍是冰山和北极熊的世界。
- What kinds of regional metamorphic rocks are present in the area? 在这一地区有哪些种类的区域变质岩?
- Magnetic polarity;ionic polarity. 磁极性，离子极性
