例句與造句

1. Residual concentrations of biocides and corrosion inhibitors are of potential concern for OTC and blowdown from open recirculating systems.
2. This includes laboratory tests on aqueous hydrolysis, photolysis in water and air, biodegradability in soils and water-sediment systems under estuaries or prairie potholes, nor do they reveal transformations at low residual concentrations at which biodegradation may stop.
3. It's difficult to find residual concentration in a sentence. 用residual concentration造句挺難的