企业需精密计算，只有当能源与散热节省的成本，远超网络延迟带来的效率损失及额外管理开销时，套利才真正成立。
Friedmann wrote as a guest columnist at the Tennessean, pushing for criminal-justice reform. State legislators invited him to testify before committee hearings, where he made for a captivating expert witness: a former prisoner so well versed in the law that his arguments had to be taken seriously.
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