PLM系统并不是真正用来管理产品完整生命周期的。它是一个定位在前端的系统，跟概念和细节设计关系更大。

PLM systems don't really manage the product's entire lifecycle. It is a front-end oriented system more related to concepts and detailed design.

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美国宇航局随后低调处理了火星上有生命这个概念并且代之以系统的宣传探索火星的后期地质和气候。

NASA subsequently played down the notion of life on Mars and instead set out on a methodical campaign to explore the past geology and climate of Mars.

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第一，通过客户生命周期价值的计算，进行客户价值细分，提出了基于客户细分的分销系统客户服务水平的概念和计算公式。

First, the concept and calculation method of customer service level based on customer segmentation are advanced through computing the customer lifetime value.

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