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词汇 subgrade
释义

Definition of subgrade in English:

subgrade

noun ˈsʌbɡreɪd

  • 1A subsidiary or subordinate grade; a secondary gradation; a grade within a grade.

  • 2Civil Engineering. In the construction of roads and other flat load-bearing surfaces: the layer (typically the prepared natural ground) lying immediately beneath the foundations.

Origin

Late 18th century. From sub- + grade.

Definition of subgrade in US English:

subgrade

nounˈsʌbɡreɪd

  • 1A subsidiary or subordinate grade; a secondary gradation; a grade within a grade.

  • 2Civil Engineering. In the construction of roads and other flat load-bearing surfaces: the layer (typically the prepared natural ground) lying immediately beneath the foundations.

Origin

Late 18th century. From sub- + grade.
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