名词
中文翻译：年龄
同义词：
['duration', 'age', 'lifespan']
例句：
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1. He has lived in this city for 20 years.
他在这个城市生活了20年。
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2. The old man is 75 years old.
这位老人有75岁。
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3. The children are growing up quickly, and they will soon reach their prime age.
孩子们正在迅速成长，他们很快就会达到他们的黄金年龄。