单词	house dust
释义	house dust noun : an airborne respiratory allergen of uncertain origin found about houses and held to be the chief cause of nonseasonal hay fever Word History First Known Use 1830, in the meaning defined above
随便看	hard-shell crab hard-shelled hard-sized hard-stemmed bulrush hard-surface hard-times token hard-wearing hard-won hard-wooded hard/heavy going hardanger Hardanger fiddle hardasses hardback hardbacker hardbackest hardbacks hardbake hardbakes hardball hardballs hardbeams hardboard hardboards hardboot

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