The theory is, if you give away a razor, you can make up the loss by selling lots of blades.
这种理论是，如果你赠送一把剃须刀，你可以通过出售大量刀片来弥补损失。
2
Because the beam was powerful enough to drill holes in razorblades, physicists measured its power in gillettes, or the number of blades penetrated.
由于激光光束的能量强大到足以在刀片上钻洞，物理学家使用穿透刀片的数量作为激光能量的计量单位。
3
It might save time to buy your lip-gloss, moisturizer, toothpaste, razorblades, and deodorant at the same time and place you’re getting your food, but you’ll be paying a premium price.