Polar circle

Many make their dream come true , and take a trip to the Polar Circle .

其中有些人的梦想就成为了现实，他们真的去了北极圈。

Its high thermal insulation is a result from eiders adaptation to the bitterly cold ocean around the Polar Circle .

其高保温特质缘自凫鸟对北极圈严寒气候的适应能力。

Kinematic vorticity , polar Mohr circle and thier application in quantitative analysis of general shear zones

运动学涡度、极摩尔圆及其在一般剪切带定量分析中的应用