humic substance造句怎么写

In the immense and vast global biosphere, there exists a kind of noteless melanocratic organic matter which is humic substances.

Extraction of humic substances from sediments is often the first task that confronts the investigator.

Oxidation and coagulation of humic substances from landfill leachate by Fenton's reagent

Influence of pressure on the separation of humic substances from MBR effluent of landfill leachate by ultrafiltration