observing用法_例句
observing 朗读
observing
音标：əb'zɜːvɪŋ
observing翻译
observing双语用法和例句
相关单词
obelisk ostpreussen overabound opulent obelise oeo ostectomy overgrew orrow osset ontologize obelia orgie oaec outfall outsettlement obstupefy observation oop obstetrics