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![knowwhy造句]( "knowwhy造句")
knowwhy造句
Scientistsdonotknowwhydinosaursbecameextinct,butsometheoriespostulatethatchangersingeography,climate,andsealevelswereresponsible。″Idon＇tknowwhy,″thesalesmananswered,″butyoucan＇tputitonyourhookunless...
