It is natural for average prices to be lower in poorer countries because wages are lower.

穷国因为工资较低所以自然而然地平均价格也比较低。

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Meanwhile, labor wages will be adjusted upward, the prices of natural resources will further reflect the relation of market supply and demand and environment cost.

同时，劳动工资会向上调整，能源资源价格会进一步反映市场供求关系和环境成本。

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To investigate how sleep affects worker wages, the researchers took advantage of a kind of natural experiment - sunset times across American time zones.

为了研究睡眠究竟怎样影响员工工资，研究人进行了一项自然试验——利用美国时区日落时间。

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But that, they argue, implies a mistaken reliance on factors such as natural resources, cheap wages or geographic location, and will not provide the basis for long-term prosperity.

ECONOMIST: Fish out of water

Due to widely varying country conditions, some African economies can take advantage of favorable wages and natural resources and benefit from taking timely measures to develop and export manufacturing goods.

CNN: Opinion: Could Africa be world's next manufacturing hub?

Ethiopia's comparative advantage in wages, productivity, and natural resources has led the Huajian Group, a Chinese shoe maker, to build a factory in Ethiopia in three months, with two production lines starting in January 2012, exporting 20, 000 pairs of shoes a month and creating some 550 jobs.

CNN: Opinion: Could Africa be world's next manufacturing hub?