The optimization of urban industry structure can cause the mass effect of economic, and the adjustment of urban industry structure can lead to the changing of the way and the structure of land use.

城市产业结构的优化会产生经济聚集效应，而城市产业结构的调整会引起用地方式和土地利用结构的转变。

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IMF, has proved to be very expensive, especially as aid to effect structural adjustment programmes and enhance and support economic growth was suspended in 1990.

ECONOMIST: Letters