渗水土路基的英文：
permeable soil subgrade

permeable是什么意思：
a. 有浸透性的,能透过的
  • This membrane is semi-permeable.
    这层膜是半渗透性的。
  • The waste material is placed in cells with permeable membranes
    废液置于有渗透膜的槽中。
  • The major difference is that geological structures have limited permeability.
    主要的问题是地质结构的渗透性有限。
soil是什么意思：
n. 土地，土壤；国土，领土
v.（被）弄脏
  • He died on British soil.
    他死于英国。
  • The soil is difficult to work with.
    这块污迹很难处理。
  • The fertilization of soil is a subject to the farmers.
    肥料的施用对农民来说是一门学问。
subgrade是什么意思：
地基; 路基
  • Road bed is the subgrade on which are laid the ballast, ties and rails.
    路基就是上面铺着道渣，枕轨和钢轨的底基。

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