The scarcity of resources is all the time the center of the research. But presently the rare resources have begun to change from labor and capital into natural resources.

经济学一直是以研究稀缺资源为中心的，而现在的稀缺资源已从劳动和资本开始变为自然资源。

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The scarcity of resources is always the center of the research of Economics. But at present the rare resources have begun to change to natural resources from labor and capital.

经济学一直是以研究稀缺资源为中心的，而现在的稀缺资源已从劳动和资本开始变为自然资源。

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The wages of employees are agreed by the labor and management, the determining factors are the relative degree of scarcity of the employees and the status of both sides.

工人的工资是劳资双方谈判的结果，决定谈判结果的是劳动者的相对稀缺程度和谈判地位。

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Yet, with very young working populations, the scarcity of skilled labor, management experience, and leadership skills are very significant and represent an impediment to attractive investments.

FORBES: The Talent and Leadership Gap in Developing Countries

With the tabs from their springtime spending coming due, consumers are also under pressure from a stagnant labor market, the likelihood of tax hikes and a scarcity of credit, writes Citigroup analyst Deborah Weinswig in a note Tuesday.

FORBES: Consumers' Spring Spending To Wither In Summer Heat