1.
electrode (retaining) collar
电极圈［环］，电极夹持环
2.
It is very cold in the Arctic Circle all the year.
北极圈内终年寒冷。
3.
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）。
4.
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。
5.
the regions north of the Arctic Circle centered on the North Pole.
北极圈以北的以北极为中心的区域。
6.
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。
7.
between the Antarctic Circle and the Tropic of Capricorn.
位于南极圈和南回归线之间。
8.
The Arctic Circle is the boundary of this region of darkness.
北极圈就是这一黑暗地带的边界。
9.
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。
10.
North of the Arctic Circle=THE LAND OF LAPPS AND REINDEER
北极圈北部——拉普人和驯鹿的故乡
11.
The camp is situated just north of the 69th parallel[5], inside the Arctic circle.
集中营位于北纬69度正北方、北极圈以内。
12.
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。
13.
In Sweden, there is a hotel built of ice, which lies in the Arctic Circle.
瑞典有一座用冰建造的旅馆, 位于北极圈内。
14.
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。
15.
G is a maximal acyclic graph.
G是一个极大无圈图。
16.
Bicyclic Graphs with Extremal Kirchhoff Index;
双圈图的Kirchhoff指标极值
17.
Either half of such a great circle from pole to pole.
子午线从极点到极点的大线圈的一半
18.
To my immense gratification, he fell into the trap.
令我极为满意的是,他中了圈套。