subgrade
名词 n.
英文释义
名词 n.
- The layer of native soil on which the foundation of a road is laid.
- A taxon ranking immediately below grade.
词形变化
词源
Etymology tree
Proto-Indo-European *upó
Proto-Italic *supo
Latin sub
Latin sub-der.
English sub-
English grade
English subgrade
From sub- + grade.
Proto-Indo-European *upó
Proto-Italic *supo
Latin sub
Latin sub-der.
English sub-
English grade
English subgrade
From sub- + grade.
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数据来源: Wiktionary