In research conducted for the pressure group by De Montfort University, over-55s were expected to account for the majority of votes cast in 94 marginal constituencies.
Bundling selling is a kind of popular method for selling information goods. And this method should be taken into account on the basis of low marginal production cost.
捆绑式销售是当前比较流行的信息商品销售方法之一，这种方法充分考虑了生产时的低边际成本。
3
Not only the system marginal price, contract price and contract quantity of electricity, but also the capacity of the plants the system demanded are taken into account in the model.