bottom soil

• 底土

bottom soil的用法和样例：

例句

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。