土壤有自净能力但是它的自净能力是有限的。长期的污水灌溉也会带来污染物积

土壤有自净能力但是它的自净能力是有限的。长期的污水灌溉也会带来污染物积累，尤其是重金属。土壤被污染以后，进而是水体、植株受到污染，然后就会危害人类身体健康。

結果 (英文) 1:

Self-purification ability of soil but the self-purification capacity is limited. Sewage irrigation can bring long-term accumulation of pollutants, especially heavy metals. After the contaminated soil, which is the contamination of water, plants, and hazardous to human health.

結果 (英文) 2:

Self-purification ability of soil but its self-purification capacity is limited. It will bring long-term accumulation of pollutants in waste water for irrigation, especially heavy metals. After the soil is contaminated, and thus is the water, the plant is contaminated, then it will harm human health.

結果 (英文) 3:

The soil self purification ability but its self purification ability is limited. Long term sewage irrigation can also lead to the accumulation of pollutants, especially heavy metals. After the soil is polluted, the water, the plant is polluted, and then it will endanger human health.