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单词 base level
释义

base level1

Physical Geography
noun
The lowest level to which a land surface can be eroded by running water.
  • Sea level constitutes the continental or master base level; a local base level may be different from this..

Origin

Late 19th century.

base-level2

Physical Geography
verb
[with object] To reduce (an area, feature, etc.) to base level by erosion.

Origin

Late 19th century; earliest use found in Science.

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更新时间:2024/12/23 22:34:05