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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。
- Some metals weld better than others. 有些金属容易焊，有的不容易焊。
- weld polarity 焊接极性
- 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
- It takes speed and skill to weld steel at this heat. 在这样的温度焊钢需要速度和技术。
- 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。
- It take speed and skill to weld steel at this heat. 在这样的温度焊钢需要速度和技术。
- The polar region is the habitat of the polar bear. 北极地带为北极熊的栖息地。
- Note the polarity of the voltage drop across R. 注意R上电压降的极性。
- It takes speed to weld steel at this heat. 在这样的高温下熔接钢铁需要快速。
- 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。
- They weld the pieces of a broken axle. 他们焊接断了的车轴。
- 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。
- His job is to weld parts together. 他的工作是焊接零件。
- Love and hatred are polar feelings. 爱与恨是完全相反的感情。
- Before applying heat for a weld, the plates should be clamped together. 在用热进行焊接之前，必须把金属板紧紧地夹在一起。
- 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
