polar bear
collocation北极熊
Polar bears are threatened by climate change.
北极熊正受到气候变化的威胁。
极地的；极性的
先理解核心含义，再看它在真实句子里的用法。
极地的；极性的
relating to a pole, especially of the earth or a magnet, or having polarity
The polar ice caps are melting due to global warming.
极地冰盖因全球变暖正在融化。
具有极或极性的。
Of or having a pole or polarity, as:
The two politicians have polar views on healthcare reform.
这两位政治家在医疗改革上持截然相反的观点。
They found themselves in polar positions during the debate.
他们发现自己在辩论中处于对立的立场。
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北极熊
Polar bears are threatened by climate change.
北极熊正受到气候变化的威胁。
截然相反的事物
Their political views are polar opposites.
他们的政治观点截然相反。
极地地区
The polar regions are experiencing rapid ice melt.
极地地区正在经历快速的冰融。
极地冰盖
The polar ice caps are shrinking every year.
极地冰盖每年都在缩小。
极地涡旋
The polar vortex brought record low temperatures.
极地涡旋带来了创纪录的低温。
极坐标
In mathematics, a polar coordinate system is used for circular motion.
在数学中，极坐标系用于描述圆周运动。
正好相反的人或事物
They are polar opposites in personality.
他们在性格上正好相反。
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想象北极熊站在冰块上，冰块漂浮在极地海洋，与南极正好相反。
register: mixed; contexts: 地理/极地研究, 物理学/化学, 比喻/日常; note_zh: polar作为形容词，在描述地理极地或物理极性时多用于正式或学术语境；而比喻义“截然相反的”在日常对话中也较常见，因此注册为混合。
通常用作定语，修饰名词，如 polar regions（极地）、polar opposite（截然相反的事物）。
Dictionary facts from ECDICT, WIKTIONARY, WORDNET.