U字開(kāi)頭的單詞或詞組
underdevelopunoccupiedunavoweduveitisupper jawundernourishurinalysisunnecessarilyUlan Batorunbuttonunconquerableunheardunidirectionalunsecuredunitary stateUDPGunder the pressure ofunalterableureaseunclassifiedunintelligibleunipolarunchanginguniversal setuser serviceunconstraintunopenedUTPundisclosedundiesuntreatedunripeuproarunostentatiousuncultivateduninformedunsolvableunchargedunderliningunder coverupholsterunder-the-table



















