单词	recovery and maintenance
释义	recovery and maintenance 恢复和保护
随便看	biological or nuclear weapons biological oscillator Biological Oscillators biological osteosynthesis Biological output Biological ovarian mass biological over biological overfishing biological overharvesting biological oxidation biological oxidation and syntheses biological oxidation groove Biological oxidation medium biological oxidation of sediment biological oxidation pond process biological oxidation process biological oxidation reduction biological oxidation-reduction biological oxidationsdf reduction biological oxidationsdf-reduction biological oxidation treatment biological oxido reduction biological oxygen biological oxygen demand biological oxygen demandBOD