名词中文翻译
中文翻译：人类生活层次
同义词：
['human lifespan', 'human life cycle', 'human life stage']
例句：
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1. The study of human life span iscrucial for understanding aging.
研究人类寿命对于理解衰老至关重要。
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2. The research on human lifecycle has significant implications for healthcare.
对人类生命周期的研究对医疗保健有重大影响。
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3. Human lifestages are marked by distinct physical and psychologicalchanges.
人类的生命阶段以显著的生理和心理变化为标志。