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；
2
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。
3
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.