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1. Oxford American Dictionary

   topsoil

   • IPA[ˈtäpˌsoil]

   美式

   • n.
     the top layer of soil

   • noun: topsoil, plural noun: topsoils

2. • 釋義

   n.

   名詞

   • 1. the top layer of soil keep all the topsoil you remove; you're bound to find a use for it later! dry topsoils are typical in the western Corn Belt