人们通常称其为“跑腿公司”或是“家政服务公司”，提供的服务是“帮您排队”，价格随着市场需求上下浮动。
Usually called an "errand company" or "domestic services company", they provide "queue for you" services with prices floating along with the market conditions.
如果果真如此的话，那么这将证明存在极强的市场需求并且会使价格一路飙升。
If they do well, it will demonstrate that there is strong demand and will pull up prices across the board.
市场需求有时也被称为“水平需求”，因为它是每一价格水平下需求量的加总。
This is sometimes called a “horizontal sum”because the summation is over the quantities for each price.
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