极圈的英文：
polar circles

When they reach the earth's magnetic field the energy is tra ferred into visual light around the earth's Polar Regio .
当它们到达地球磁场之后，能量便在地球极圈地带转化成可视的光线。

The alkanes are non-polar.
烷是非极性的。

Love and hatred are polar feelings.
爱与恨是完全相反的感情。

There is a ideological polarity between nations.
国家间意识形态存在截然对立。

linearly polarized light will in consequence become elliptically polarized on total reflection
因此，线偏振光径全反射后将变成椭圆偏振光。

The continuum of the corona is essentially radially polarized
日冕连续区基本上是经向偏振。

circle of longitude
经度圈;经度圈;黄经圈;黄纬圈

circle of declinatio
赤纬度盘;赤纬圈;时圈

This is a chord of a circle.
这是个圆的弦。

circle absorber
环形吸收器

This is a virtuous circle.
这是一种良性循环。