名词
中文翻译：持久性
同义词：
['persistence', 'endurance', 'stability']
例句：
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1.The constancy of the sun is a constant reminder of life's cycles.
太阳的恒常性是生命循环的永恒提醒。
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2.The constancy of the ocean has always fascinated me.
海洋的恒常性一直令我着迷。
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3.The constancy of her love for him was unwavering.
她对他的爱始终如一，坚定不移。