标准石油公司是一家垄断型企业，这是一个关键性的事实，因为“剃刀和刀片”理论在只有一家刀片(或石油)卖家的前提下才会产生最佳效果。
Standard oil was a monopoly, which is a crucial fact because the razors-and-blades theory works best when only one vendor is selling the blades (or the oil).
问题是直流电源并无单一标准，因此拥有不同卖家设备的数据中心很难做到这样的能源节约。
The problem is that there is no single standard for DC power supplies, so such savings cannot easily be achieved in a data centre filled with equipment from different vendors.
问题是直流电源并无单一标准，因此拥有不同卖家设备的数据中心很难做到这样的能源节约。
The problem is that there is no single standard for DC power supplies, so such savings cannot easily be achieved in a data centre filled with equipment from different vendors.
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