Suppose we were to graph a household's consumer spending as a function of cash-on-hand, which equals current income plus liquid assets, holding constant expected future income.
假设未来预期收入保持不变，画一个以家庭消费与库存现金的函数图---库存现金等于目前的收入加上流动资产。
In that sense, Internet use is like a periscope: When users age 50-plus put theirs up, researchers have found, they're looking both backward and forward, toward the past and the future.
在这个意义上，互联网的使用像潜望镜：当使用者年龄50余岁时，研究人员已经发现，他们也在向后和向前的寻找，面向过去和未来。
Such data, plus the fact that Alpha has a stable workforce with little employee turnover, indicate that we should use Alpha Construction Company, rather than Zeta, for all future building projects.
这些数据，再加上Alpha公司拥有稳定的员工队伍且雇员流动性很小的事实，表明我们应该使用Alpha建筑公司而不是Zeta来建造未来所有的建筑工程。
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