SFCW由于使所有水流不断与土壤层、砾石层和豆石层反复接触，生成难溶性磷酸盐的几率大大高于SFCW，能够比SFCW更加显著地促进磷沉积。
W-SFCW system, which provides more interaction surfaces for wastewater to react with soil, oval stone and small-sized stone layers, showed higher chances to form insoluble phosphate than SFCW.
SFCW由于使所有水流不断与土壤层、砾石层和豆石层反复接触，生成难溶性磷酸盐的几率大大高于SFCW，能够比SFCW更加显著地促进磷沉积。
W-SFCW system, which provides more interaction surfaces for wastewater to react with soil, oval stone and small-sized stone layers, showed higher chances to form insoluble phosphate than SFCW.
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