The results revealed that copperpollution and strong acid were the major problems of this mine land.
研究表明,铜污染和强酸性是该矿山土地的最主要问题。
2
Further analysis indicated that external copperpollution was the major cause of the crack in the bent pipe.
进一步分析,认为外来铜污染是引起弯管开裂的主要原因。
3
The fact that copperpollution of laccaic acid in stick lac could not be avoided was concluded after considering its biological source and chemical nature.