Considering the cost of perishable inputs, what other category has lower input costs?
想想还有哪类产品的成本比它低？
2
Health care costs also have outstripped inflation; the cost of a catastrophic illness can quickly knock a middle-class household into another, better-defined economic category: poverty.
医疗费用的增速甚至也超过了通胀率；生一场大病就能迅速把一个中产家庭打入贫困家庭的行列。
3
They're trying to determine whether netbooks represent a new category of low-cost computers ideally suited for these times - or a flash-in-the-pan.