N字开头的单词或词组
nabnervesnervousnessnebulanormallyNiagaranormnormalitynone other thanNATOnail downNaranumericneoprenenothing likeniecenow and thenneedynaturallyNinymphomaniacnotchnonstopnessnamelyNew EnglandnuditynasalNobel prizenoisesnet errornotedniacinnutcrackernibsnational flagnecessarilynear herenicelynursingNANorwegian