It is one of the most important decision-making activities that how to decide the maintenance cycle, the number of maintenances and the optimal life cycle.

如何确定装备系统的维修周期、维修次数及最优经济寿命周期，成为企业最重要的决策活动之一。

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I like children's clear eyes, and thanks children for growing together with me! Achieve the ultimate efficiency with the best mood and optimal life attitude.

喜欢孩子清澈的眼神，感谢孩子让我与你共同成长！用最好的心情和最优的生活态度达到最极致的工作效率。

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Extreme high-performance sports may lead to optimal cardiovascular performance, but they quite certainly do not prolong life.

极限高强度运动可能会带来最佳的心血管功能，但这些运动肯定无法延长寿命。

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In general home life is now more complex and capital intensive than optimal and work life is simpler and more labor intensive than optimal.

FORBES: Japan, Demographics and National Productivity

It adds that the lightweight nature of the system means that apps should run smoothly and offer "optimal battery life" on low-end devices.

BBC: First Firefox phones revealed by Mozilla and Geeksphone

You construct a number of plans for achieving that life, picking the optimal one, i.e. the one that will get you there in the shortest time, or with the least amount of effort or will produce the most pleasant journey.

FORBES: How To Plan Your Life, When You Can't Plan Your Life