名词中文翻译
中文翻译：极圈
同义词：
['polar circumference', 'polar radius例句：1. The polar circle is the boundary between the Northern and Southern Hemispheres.（极圈是北半球和南半球的分界线。）']
例句：
-
1. The polar circle is the boundary between the Northern and Southern Hemispheres.
极圈是北半球和南半球的分界线。
-
2.The Earth's axis makes an approximate 360-degree turn around the polar circle.
地球轴在极圈附近大约转了360度。
-
3.The polar circle is a crucial point in determining the Earth's rotational speed.
极圈是确定地球旋转速度的关键点。