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wall fern

资料来源 : WordNet®

wall fern
     n : mat-forming lithophytic or terrestrial fern with creeping
         rootstocks and large pinnatifid fronds found throughout
         North America and Europe and Africa and east Asia [syn: {common
         polypody}, {adder's fern}, {golden maidenhair}, {golden
         polypody}, {sweet fern}, {Polypodium vulgare}]
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