bottom soil

英 美
  • 底土
  • bottom n.底部;底端adj.底部的v.触底;打(基础)
  • soil n.土地;土壤;污物,粪便v.弄污
    1. In this experiment the soil in which clams were reared was turned over periodically tosee whether the treatment benefited the growth of the clams.
      摘要本报告探讨定期翻掘养殖池的底土是否能维持良好的底质,使文蛤有较佳的活存率与成长。