名词
中文翻译：五旬老翁
同义词：
['elderly', 'senior citizen']
例句：
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1. He is a quinquagenarian who has lived in the city for over fifty years.
他是一个五旬老翁，已经在城市生活了超过五十年。
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2. The quinquagenarian was honored with a special award for his contributions to the community.
这位五旬老翁因其对社区的贡献被授予特别奖项。
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3. As he grew older, he became more reclusive and rarely ventured out into the world.
随着年龄的增长，他变得更加孤僻，很少外出。