Using Pearl River source water as raw water, the contaminant removal effect of carbon and sand filter after the biological aerated filter(BAF)pretreatment process was investigated.
以珠江广州段源水为处理对象，考察了曝气生物滤池（BAF）预处理工艺后炭砂滤池的除污效果。
It is an important item to develop and construct tourist resources in the place around the source of the Pearl River.
珠江源头地区旅游资源开发与建设是该地区经济振兴的一项重要内容。
Therefore, the presence of abundant 4-methyl steranes is a necessary but not sufficient indicator for the Wenchang Formation source in the eastern Pearl River Mouth Basin.
因此，4-甲基甾烷的存在不能作为判识珠江口盆地东部油源主要是文昌组的唯一证据。
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