1.
the sun visible at midnight (inside the arctic or antarctic circles).
半夜看到的太阳（在北极圈内或南极圈内）。
2.
of or existing at or near a geographical pole or within the Arctic or Antarctic Circles.
位于地理极或地理极附近的、在北极圈或南极圈的。
3.
between the Antarctic Circle and the Tropic of Capricorn.
位于南极圈和南回归线之间。
4.
The Antarctic Circle is the boundary of this region of lightness.
南极圈就是这一明亮地带的边界。
5.
an extremely cold continent at the south pole almost entirely below the Antarctic Circle; covered by an ice cap up to 13,000 feet deep.
最冷的一个洲，位于南极，几乎完全处于南极圈内；覆盖冰雪厚达英尺。
6.
large penguin on islands bordering the Antarctic Circle.
生活在接近南极圈的岛屿上的大型企鹅。
7.
bears are asocial secretive animals; are you asocial or do you just enjoy living in the Antarctic?
熊是不合群的孤僻的动物；你是离群的或者仅仅喜欢住在南极圈？
8.
the part of the Earth's surface between the Arctic Circle and the Tropic of Cancer or between the Antarctic Circle and the Tropic of Capricorn; characterized by temperate climate.
地球上两个地区之一，位于北极圈和北回归线之间或南极圈和南回归线之间；以温和的气候为特征。
9.
of or relating to latitudes just south of the Arctic Circle.
属于或关于紧邻北极圈以南的地区。
10.
It extends for sixteen-million square kilometers south of the Arctic Circle.
它占据了北极圈南部的1600万平方公里的面积。
11.
The equator is a great circle midway between the North and South Poles.
赤道圈是一个位于南北极当中的大圆周。
12.
A GROUP VELOCITY OF SEISMIC LOVE SURFACE WAVE AND LITHOSPHERE STRUCTURE IN ANTARCTIC PENINSULA
南极半岛地区地震勒夫波群速度与岩石圈结构
13.
Scientists believe that tiny ice crystals of nitric acid in Antarctica's upper atmosphere are directly involved.
科学家认为，南极上部大气圈内微小的硝酸冰晶也直接参与其中。
14.
The majestic Rocky Mountains stretch all the way from Mexico to the Arctic.
巍巍的落基山脉南起墨西哥一直向北延伸到北极圈。
15.
By 1898, the route had been lengthened to start at Bergen in the south, extending northward to Kirkenes, far above the Arctic Circle.
到1898年，这一航线已扩展到南边的波根，北至北极圈腹地的科科恩斯。
16.
electrode (retaining) collar
电极圈［环］，电极夹持环
17.
It is very cold in the Arctic Circle all the year.
北极圈内终年寒冷。
18.
G is a maximal acyclic graph.
G是一个极大无圈图。