应用每一个时期需要的层次，环境和配置，或者质量标准。
The level of coverage needed for each area of the application, the environment and configuration, or quality criteria.
我很高兴相信在我们作为一个民族生存的每一个时期，在人民大众中已经存在。
I am happy to believe that at every period of our existence as a nation there has existed.
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 .
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