Chapter four is to describe the situation of employment in China, including total amount, regional distribution, and industry distribution and the problems concerned to China's employment.

第四章是我国就业情况的概述，包括就业的总量，就业的地区分布，行业分布，产业分布，以及我国目前就业中存在的主要问题。

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China has large area of Carbonate distribution, but the high maturity and lower total organic carbon contents (TOC) have been troubling the evaluation of source rock.

碳酸盐岩在我国大面积分布，但高演化、低有机质丰度的特征一直困扰着烃源岩的评价。

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The distribution of expansive soil in China is very wide, especially in NanYang, expansive soil area occupies 65 percent of the total area.

我国膨胀土分布广泛，尤其在南阳地区，膨胀土分布面积占整个南阳盆地的65%。

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