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单词
underclay
释义
underclay
noun
:
a layer of clay beneath a coal bed often containing fossil roots of coal plants and constituting fireclay
Word History
Etymology
under
entry
3 +
clay
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sagittaries
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sagittariuses
sagittary
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sago
sago fern
sago palm
sago pondweed
sagoin
sagoins
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sags
saguaro
Saguaro National Park
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更新时间:2025/3/16 11:16:26