现阶段，为了节约土地，地下工程逐渐增多。
Nowadays, in order to save land, underground projects gradually increase.
高层住宅的优点是可以节约土地，增加住房和居住人口。
High-rise apartment has the virtue of saving land, increasing both residential area and number of inhabitants.
他希望将村民安置在少数人口更稠密的城镇，从而节约土地。
He wishes that land can be conserved by resettling villagers into fewer and extra densely populated towns.
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