obligation例句_释义
obligation 朗读
obligation
音标：ɒblɪ'ɡeɪʃən
obligation翻译
obligation双语用法和例句
相关单词
ornamentally oarsman ossify orem ocher orthopraxis oneirocritical oxfly ovr oratorial oaa osteon outwith oceanfront oilcan orientalism overcommit oniongrass overprotect octopodes