Substratum



GRE

解释

GRE 红宝书

• n.基础, 根据
• ［英］ n.基础, 根据 ( an underlying support;foundation)
• ［记］ sub ( 下面) ＋stratum ( 层次) -> 下面一层 -> 基础

Webster Collegiate

noun (plural substrata)

• Etymology: Medieval Latin, from Latin, neuter of substratus, past participle of substernere to spread under, from sub- + sternere to spread — more at strew
• Date: 1631
• an underlying support ; foundation: as
  • a. substance that is a permanent subject of qualities or phenomena
  • b. the material of which something is made and from which it derives its special qualities
  • c. a layer beneath the surface soil; specifically subsoil
  • d. substrate 2

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