Although R2 was sensitive to organic acids, the concentrations of LMW organic acids in the contaminated soils were rather lower than the tolerable levels.

• 尽管氧化亚铁硫杆菌对低分子量有机酸很敏感，但是试验土壤中低分子量有机酸的浓度远远低于硫杆菌的耐受限度。