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。

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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。

《牛津词典》

The element-geochemical features reflect that hybridism of continental crust occurs in the source area.

元素地球化学特征反映了陆源地壳杂化。

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Veolia Environmental Services was the other firm fighting to run the incinerator, and whose spokesperson said it believed it was "sympathetic with the local environment and represented a unique opportunity to use the residual waste to provide a secure source of sustainable energy and heat to the neighbouring Tata Steel steelworks - a major source of employment in the area".

BBC: Artist's impression of a Viridor plant in Cardiff

Real-estate agents who have sold properties in your area are another good source of information on home prices.

WSJ: Are Sellers' Appraisals and Inspections Overkill?--WSJ House Talk

The FBI is also looking at locations in the Denver, Colorado, area where bomb-making materials may have been purchased, a law enforcement source said.

CNN: Afghans were targets of New York terror raid, source says