营养素在生命周期的成长与健康中所扮演的角色。
The role of nutrition in growth and health through the life cycle.
在每一个时期里面事物的状态、特征是不同的，生命周期论强调了成长的阶段性。
Inside each time the thing are different, the life cycle theory emphasized the growth gradualness .
我想，人生就像一首诗。它有自己的规律。它有成长与衰老的周期。
It has its own rhythm and beat. It has cycles of growth and decay.
我想，人生就像一首诗。它有自己的规律。它有成长与衰老的周期。
It has its own rhythm and beat. It has cycles of growth and decay.
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