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1·The polar vortex is a system of wintertime winds.

极地涡旋是冬季风形成的一个风系。《柯林斯英汉双解大词典》

2·There was a period of excessive warmth which melted some of the polar ice.

有段时期温度过高，融化了极地的部分冰层。《柯林斯英汉双解大词典》

3·Polar bears live in the Arctic.

北极熊生活在北极。

4·It's located in the moon's South Polar Region.

它位于月球的南极区域。

5·On Wednesday, a polar wind brought bitter cold to the Midwest.

周三，一股极地风给中西部地区带来了刺骨的严寒。

6·I'm back in Finland with the snow, reindeers, and polar bears.

我回到了芬兰，那里有雪、驯鹿和北极熊。

7·If you live near the Arctic Circle, hug the closest polar bear.

如果你生活在北极圈附近，请拥抱离你最近的北极熊。

8·With the temperature rising, polar ice will melt at a faster rate.

随着温度的上升，极地的冰会以更快的速度融化。

9·This is the result of the four polar bonds clustering symmetrically in space.

这是四个极性键按空间对称聚集的结果。

10·Biologists calculate that there are about 20,000-25,000 polar bears worldwide.

生物学家估计，全世界大概有2万至2万5千只北极熊。

极性的

1·Now, will it be polar or nonpolar?

那么他是极性还是非极性呢？

2·We could target specific abnormal proteins, put a polar charge on the nanoparticles and use magnets to focus them on those areas of the tumor.

我们可以针对不正常的蛋白质，在纳米粒中放上一个极性电荷，用磁力把它们集中到肿瘤部位。

3·Both beer and shampoo have polar molecules that accumulate at a liquid-gas interface, but the mechanisms that prevent bubble collapse in soap foams or pilsner heads are fundamentally different.

啤酒和洗发水都有极性分子，它们可以在气液分解面上积累，但是阻止气泡破掉的机制，对于肥皂沫和啤酒来说，有着根本上的区别。

4·This is pure covalency. This is polar covalency.

这是平均共价，它是极性共价。

5·Other polar solids, we will have to come back to that later.

其它的极性固体，我们在后面会讲到这一点。

极地的

1·There was a period of excessive warmth which melted some of the polar ice.

有段时期温度过高，融化了极地的部分冰层。《柯林斯英汉双解大词典》

2·With the temperature rising, polar ice will melt at a faster rate.

随着温度的上升，极地的冰会以更快的速度融化。

3·The Canadian Arctic is a vast, treeless polar desert that's covered with snow for most of the year.

加拿大的北极是一个广阔的、没有树木的极地沙漠，一年中大部分时间都被雪覆盖着。

4·Adaptations to the regular change of seasons in the temperate and polar regions may be relatively simple.

在温带和极地地区适应季节的规律变化可能是相对简单的。

5·Scientists have long suspected that several factors lead to greater temperature swings at Earths polar regions than elsewhere.

长期以来，科学家们一直怀疑有几个因素导致了地球极地地区比其他地区更大的温度波动。

极的

1·As the ocean warms, a body of water called the Antarctic Polar Front—an upward movement of the nutrient-rich sea that supports a huge abundance of marine life—is being pushed further south.

随着海洋变暖，一个被称为南极极锋的水体——一个支持大量海洋生物生存的营养丰富的海水上升运动——正被进一步推向南方。

2·But still we could set this up and then switch to polar coordinates to evaluate this integral.

但还是可以建立这个积分，然后转换到极坐标系下去求结果。

3·To check an egg for chromosomal abnormalities, doctors use a laser to make a small incision in the outer membrane, which allows them to extract the polar body and the chromosomes it contains.

为了检查一个卵细胞的染色体是否异常，医生用激光在卵细胞外膜上切一小口，通过这个小口抽取极体及其所含的染色体。

4·The new technique checks the chromosomes in the polar body.

这项新技术用于检查极体中的染色体是否异常。

5·Hovering directly above Mars limits communications to just one polar region.

直接悬停在火星，就把通讯限制在仅一个极区。

两极的

1·The polar regions of the Moon will likely play a strategic role in the first phases of lunar exploration and development.

在月球探险和开发的第一阶段，月球的两极地带有可能成为具有战略意义的基地。

2·People who live near polar regions see the auroras as giant curtains of shimmering light in a variety of colors.

居住在两极附近地区的人们所看到的极光犹如一张五彩缤纷的巨大光幕。

3·The income skews are even more distinct, essentially polar opposites of each other.

在收入方面倾斜更加明显，基本上是对立的两极。

4·That would fit with observations that the ridges are very smooth compared with the rugged polar regions, implying they are made from fine particles similar to those found in Saturn's rings.

这样就能解释为什么这些隆起处十分光滑而两极地区却崎岖不平了，说明他们是由细小的微粒组成的，这些微粒与在土星环上发现的很相似。

5·Most insects don't live in polar regions.

大多数昆虫在两极地区不存在。

北极的

1·This has focused world attention on the polar regions, whose ice is melting at an alarming rate.

北极区也就是要关注的焦点所在，因为冰层融化的速度快得令人担忧。

2·Such research, Dr. Untersteiner said, promised to promote understanding of the fundamental forces at work in global climate change, including the endless whorls and gyres of polar ice.

昂特斯坦纳博士表示，这样的研究有望加深我们对影响全球气候变化主要因素的认识，包括对北极冰面出现的无数旋涡和环流的了解。

3·The rivalry between the five Arctic neighbors has heated up as melting polar ice makes the region more accessible.

融化的北极冰层使得进入该地区越来越容易，这也使得此北极圈五国之间的矛盾日益升级。

4·The powerful icebreaker took part in the rescue operation to save the Italian polar expedition led by Umberto Nobile.

这艘强劲的破冰船参与了安伯托·诺比尔的营救行动。当时他正带领一支意大利北极探险队。

5·If you can handle not living like a polar bear, try keeping your thermostat at 78 degrees.

如果你不想房间里冰冷冰冷的，像住在北极一样，可以把你的温度调节器调到78度（华氏摄氏度）。

南极的

1·They have recently been recognized as the dominant source of sea salt aerosol in Antarctica and scientists suspect they may be the main cause of tropospheric ozone depletion during the polar sunrise.

现在这些分子被认为是南极洲海盐浮粒的主要来源。科学家们猜测它们可能是导致南极附近日出时对流臭氧层耗弱的主要原因。

2·The formation of Antarctic ozone hole is mainly related to the polar stratospheric clouds and the processes of heterogeneous chemistry.

南极臭氧洞的形成与南极平流层云及其非均相化学过程有很大关系。

3·This composite image depicts the moon's rugged south polar region and is the highest resolution topography map to date of the moon's South Pole.

月球南极地形这张合成图像描绘了月球崎岖的南极地区，是月球南极迄今最高解析度的地形图。

4·We could do this in theory by studying an enormous impact crater, known as the south Pole AK basin. It's located in the moon's south polar region.

做到这点，理论上我们可以通过研究一个巨大的撞击坑，比如南极ak盆底，它位于月球南极地区。

极线

1·By analyzing trouble phenomenon on dust accumulation of duster and polar discharge, the appropriate measures are taken.

对除尘器产生的积灰、极线放电等故障现象进行了分析，采取了相应的措施。

极面

1·The angles refer to the polar view angle, i. e. the angle measured from the vertical.

角涉及到极面观的角，例如垂直物上测量的角。

(1)polar bear北极熊

(1)polar coordinate极坐标；极座标；极坐标系统

(1)polar region极地；近极区域

(1)polar ice极地冰

(1)polar solvent[化]极性溶剂

(1)polar fleece摇粒绒