polar circle

As It'situates near the Arctic Circle, there happens polar day and night.

由于它靠近北极圈, 这里有极昼和极夜.

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

But, if it's like a circle or a half circle, or things like that, then even if a problem doesn't tell you to do it in polar coordinates you might want to seriously consider it.

但是如果它是一个圆或者半圆，或者是类似的，即使题目没有提示你在极坐标里做，你也应该认真考虑一下。

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。

The polar bear is found in the Arctic Circle and some big land masses as far south as Newfoundland ．

北极熊生活在北极圈和纽芬兰以北的一些大的陆地。

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。