名词
中文翻译：年龄
同义词：
['age', 'duration', 'period', 'time', 'years例句：1. The ancient city has a long history and is still in use today.（这个古城历史悠久，至今仍在使用。）']
例句：
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1. The ancient city has a long history and is still in use today.
这个古城历史悠久，至今仍在使用。
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2. The scientist has been studying the effects of aging for many years.
这位科学家已经研究衰老效应多年了。
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3.The baby's age is just three months old.
这个婴儿只有三个月大。