observation用法_例句
observation 朗读
observation
音标：ɒbzə'veɪʃən
observation翻译
observation双语用法和例句
相关单词
oaves outcry opisthobranch odorously osteoma orthokeratology oomingmack oligophagous overlearn overquantification obliquity ohmage outstink obligee orchestic oup oliver outcrossing oxymoron overpunch