名词
中文翻译：极点
同义词：
['extreme', 'limit', 'boundary']
例句：
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1. The polar infinity is the point where the Earth's magnetic field reaches its strongest.
极点是地球磁场达到最强的地方。
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2. The scientist found the polar infinity to be a key to unlocking the secrets of the universe.
科学家发现极点是解开宇宙秘密的关键。
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3. The team worked tirelessly to reach their polar infinity goal.
团队不懈努力，达到了他们的极限目标。