We should therefore use the principle of economy and cut them out of the theory.

因此，我们应该使用经济原则，将它们从理论中剔除。

One of the reasons our stores can offer such low prices is that they operate on the principles of economies of scale.

我们的商店能够提供如此低的价格的原因之一是它们按照规模经济原则运作。

It seems better to employ the principle of economy known as Occam's razor and cut out all the features of the theory that cannot be observed.

似乎更好的做法是采用被称为奥卡姆剃刀的经济原则，并剔除理论中所有无法观察到的特征。