| 释义 |
自净作用zìjìng-zuòyòng大气、土壤或水体等受到污染后能够自然净化的作用,通过物理、化学、生物等自然作用而使污染物总量减少,浓度降低,逐渐恢复到未污染的状态。{self-purification; self-purification of polluted atmosphere, soil or water through physical, chemical and biological reactions to cut down the total quantity and density of the pollutants, and gradually restore itself to the unpolluted state} |