求几句话翻译

Coupons are usually assigned to the location, at designated shopping centers before they can buy merchandise, but also completed a one-time consumption, not give change. It is a kind of shopping mall promotions. Shopping Center just launched for promotional merchandise. At a certain extent, It also limits the freedom of choice of consumers, with the attendant impact on conditions in the free selection of the consumption structure is not conducive to long-term economic development.