obligatory例句_释义
obligatory 朗读
obligatory
音标：ə'blɪɡətəri
obligatory翻译
obligatory双语用法和例句
相关单词
ol oddpermutation outgame overscolling odourless oxotremorine oer orca overrule outmaneuver orchardist obtestation oleic oligosaccharide obscurantic osmious overcompensation odovacar oxalic overaggressive