生命方程
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life cycle equation
生命周期方程
以上为机器翻译结果，长、整句建议使用 人工翻译 。
The calculation equation of the economic insulating layer thickness in different service life was (derived) through the life cycle economical analysis of the mini-cold storage.
通过有限生命周期内微型冷库经济性能的分析，推导了微型冷库在使用年限不同时的经济保温层厚度计算公式。
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The price-tag looks even heftier when the limited versatility and survivability of unmanned aircraft are factored into the life-cycle cost equation.
FORBES: The Revolution In Unmanned Aircraft Is Overrated
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