When each unit of system is series structure, reliability distribution is analyzed under the conditions that cost is taken into account and mass and volume are constrained.

在系统各单元为串联结构时，在综合考虑价格、质量和体积等约束条件下，对可靠性分配进行了分析。

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The compositions associated with stop codons are constrained, it is one of factors that affects the base distribution in protein-coding genes.

这表明终止密码子在不同层次上限制基因组分的使用，是影响基因碱基分布的因素之一。

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Starting with the constrained optimization method, an algorithm for the even distribution of the machining allowance is developed.

从约束优化方法入手，提出了复杂等距型面加工余量均布优化算法。

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Apple Chief Operating Officer Tim Cook replies that distribution constrained sales, and that Apple is working to put the iPad in more outlets.

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