这好比钢铁的价格几乎下降为零，以致于King Gillette能够将剃刀和刀片双双派送，他完全可通过其它产品或服务赚钱。
It's as if the price of steel had dropped so close to zero that King Gillette could give away both razor and blade, and make his money on something else entirely.
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).
并且放在浴室的潮湿刀片上藏匿着旧头发和死皮，使用剃刀的时候会导致毛发内生，引发刺激性反应，因为刀片变钝了。
And a moist blade kept in the shower, harbouring old hair and dead skin, can lead to ingrown hairs and irritation when shaving because the blade becomes blunt.
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