并不是所有的实验都是成功的，许多实验虽然有利于GDP增长，但也同时导致了产能过剩、污染、腐败和“鬼城”等问题。
Some experiments have had less clear results, making, say, a positive contribution to GDP growth, but also contributing to problems like excess industrial capacity, pollution, corruption, and the creation of ghost towns.