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- The two systems of government are polar opposites. 这两种政体正好相反。
- 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？
- "The two enantiomers rotate polarized light through opposite angles, canceling each other out so that the racemic mixture has no optical activity. 两种对映体使偏振光向相反的角度旋转，彼此抵销，所以外消旋混合物没有光学活性。
- By repeating the polar arraying and 3D copy rotating. 重复圆形阵列和三维复制旋转。
- In rotating, the shaft splashes oil up into the bearings. 当轴旋转的时候就把油溅入轴承。
- The rotating chamber of a revolver that holds the cartridges. 子弹轮转盘装有弹药的左轮手枪的旋转弹膛
- 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
- rotating polarization 旋转极化
- 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。
- A gyroscope consisting of a rotating wheel in a rigid case. 回转轮一种由装在固定的盒中的一个转轮组成的回转仪
- The polar region is the habitat of the polar bear. 北极地带为北极熊的栖息地。
- 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。
- A projecting cam, as on a rotating shaft, that activates another machine part. 凸轮如转轴上突出的挺杆，使另一个机器零件活动
- Love and hatred are polar feelings. 爱与恨是完全相反的感情。
- The centrifugal force of a rotating object decreases when it slows dwon. 旋转物体的离心力在减速时降低。
- To loosen, adjust, or remove by rotating. 通过旋转来松开，调整，或取下
- 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
