They refers not only to the thrifty of productivity and work but also to that of created assets and undeveloped natural resources.

它不仅指生产、生活、工作方面的节约，而且也包含节约人类创造出来的财富和尚未开发的自然资源；

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Russia has the world richest undeveloped forest resources.

俄罗斯拥有世界上最富裕发达的森林资源。

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The arid northwest China is an undeveloped area in economy, being rich in mineral resources but shortage in water resources due to sparse rainfall and intense evaporation.

我国西北地区降水稀少，蒸发强烈，水资源贫乏，是矿产资源富饶的缺水贫困区。

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Meanwhile, as California focuses upon wind turbines, solar panels and electric cars, vast oil and gas resources remain undeveloped.

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At the same time, we are also taking steps to identify additional resources in currently undeveloped areas to inform future development decisions.

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With a keen sense of dispossession, I wandered out of the neighborhood to find someplace to sleep, and discovered that I had barely begun to use the resources available to me when I came upon an undeveloped piece of land as wild as I could wish.

NEWYORKER: Wakefield