它用于状态标志和进程生命周期中不发生更改的其他东西，比如 pi 或非洲的所有国家。

It is useful for status flags and for other things that don't change during the life of a process, like pi, for example, or all the countries in Africa.

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生命周期评价技术被许多国家作为认证环境标志产品的工具。

Life cycle assessment technique is verified as an instrument of environmental symbol products in many countries.

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摘要 通过使用中国家庭收入调查（CHIPS）数据，本文从储蓄率的角度，实证检验了生命周期/持久性收入假说在中国是否成立。

Abstract : Using Chinese household income project series (CHIPS) data, this paper discussed whether the life cycle/permanent income hypothesis existed in China.

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