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).

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甚至是两个或多个事实间的简单比较也能带来新的启迪，前提是各个机构的“墙”别再那么严实。

Even the simple comparison of two or more facts can lead to new insight, and all of these things happen only when the walls around an institution become porous.

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但本书的编写有个基本前提，就是大部分女性虽然与她们的伴侣之间关系平等和谐，但一旦有了孩子，女性常常得不到平等的对待，她们比男方要承担更多的抚养孩子的义务，成为了事实上家庭里的“苦力”。

So do a lot of fathers, despite the basic premise of the book—that most women who set off on a footing of equality with their partners are betrayed by them when babies arrive.

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