subbase

n. 底基层, 副基层

词形变化

subbases 复数 subbases

释义与例句

n.
  1. 1.

    The lowest projecting part of a baseboard, a pedestal or a similar construct.

    建筑
  2. 2.

    The lowest course in typical road, driveway, path or sports court construction, above which is the base course, and finally the surface course.

    工程
  3. 3.

    A certain subcollection of a topological space

    数学

词汇关系

名词

上位词 2

molding moulding

词源

From sub- + base.

来源：wiktionary