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hard pan

  • 硬土层，坚硬的黏土：指一层坚硬的底土或黏土。也称为caliche。
  • 坚硬的、未破碎的土地：指坚硬、未破碎的地面。
  • 基础，基岩：指基础或基岩。

网络释义专业释义英英释义

  硬土

硬土 firm bottom; firm ground; firm soil; hard bottom; hard pan; hard soil; pan soil; shot soil 土层 solum; true soil; pedosphere; soillayer; soil horizon; soil layer .

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短语

formation of hard pan 坚盘的形成

  • 硬盘

·2,447,543篇论文数据，部分数据来源于NoteExpress

hard pan

  • n. crust or layer of hard subsoil encrusted with calcium-carbonate occurring in arid or semiarid regions

    同义词： caliche hardpan

以上来源于: WordNet

 柯林斯英汉双解大词典 

hardpan /ˈhɑːdˌpæn/

  • 1. 

    N a hard impervious layer of clay below the soil, resistant to drainage and root growth 硬质地层

权威例句

  • It's hard to predict exactly how bright Pan-STARRS will be, but you should be able to see it without binoculars or telescopes, said Don Yeomans of NASA's Near-Earth Object Program.

    CNN: Welcome to the year of the comet (we hope)

  • He has a well-honed sense of presentation and play--a popular dessert is a "planet" with a raspberry core, grapefruit-cream surface, and hard-sugar atmosphere (his blueberry satellites didn't pan out).

    FORBES: Debut

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