Tourism is a major source of income for the area.
旅游业是这个地区的主要收入来源。
It is the first time to research into the identification problem of major hazard source concerning widespread mined-out area instability systematacially.
首次对大面积采空区失稳的重大危险源辨识问题进行了系统研究。
Soybean, as the major crop in northeastern China, is the main source of peasants' income. According to an investigation made in producing area, price change has a great impact on peasants' revenue.
大豆作为我国东北产区主要农作物，是农民收入的重要来源，根据对产区的调查，大豆纯收入一般占农户纯收入的五分之之，大豆价格的变化对农民的收入影响极大。
The water pollution can be divided into two major categories of point source and area-source pollution according to the different way of discharge.
根据排放方式的不同，水体污染可以分为点源污染和非点源污染两大类。
The major elements of clastic rocks in sandstone copper deposit are controlled by the tectonic setting of source area.
分析大姚铜矿砂岩类的常量元素，反映其成岩成矿的构造背景，砂岩铜矿中碎屑岩的常量元素特征主要受物源区控制。
The major elements of clastic rocks in sandstone copper deposit are controlled by the tectonic setting of source area.
分析大姚铜矿砂岩类的常量元素，反映其成岩成矿的构造背景，砂岩铜矿中碎屑岩的常量元素特征主要受物源区控制。
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