例句與造句

1. Selenium pollution of waterways also occurs when selenium is leached from coal flue ash, mining and metal smelting, crude oil processing, and landfill.
2. But the arrogance of reclamation ran aground with the inundation of Glen Canyon by Lake Powell, selenium pollution in Southern California's Central Valley and the drying up of northern California's ancient Mono Lake.
3. It's difficult to find selenium pollution in a sentence. 用selenium pollution造句挺難的