The average daily commute is 52 minutes, noted Google -- time that could be spend doing other things once operating avehicle is taken out of the equation.
平均每天用在上下班交通上的时间为52分钟，Google 指出，如果有一天人能够不用开车的话，这些时间就可以用来做其它的事情。
Under a general assumption, we establish directly the optimality equation for infinite time horizon average cost model and prove the existence of optimal solution in a compact action set by using p.
在一般的假设条件下 ，我们应用性能势的基本性质直接建立了无限时间水平平均代价模型的最优性方程 ，并且证明了在紧致集上最优解的存在性 。
The substructure method was introduced to set up mathematical model of finite periodic composite structure, to solve its wave equation, and to derive its time-average power flows.
采用子结构法，建立了有限周期复合结构的数学模型，求出了数学模型的波动解，并推导出模型的时间平均功率流。
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