octant读音_例句
octant 朗读
octant
音标：ɒktənt
octant翻译
octant双语用法和例句
相关单词
ontogeny obstinate oligomer overspeed orthochromatic observability omoplate outargue overplow outlook oman organdy oligarchical obstupefy oceanics outrunner oblivion offhand oj ornithological