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单词	riverhead
释义	riv·er·head (rĭvər-hĕd′) n. The source of a river.
随便看	protection protectional protectionism protectionist protective protectively protectiveness protector protectoral protectorate protectorship protectory protege protegee protei proteid protein proteinaceous proteinase protein channel proteinic protein kinase proteinoid proteinous proteinuria

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