threefold axis of symmetry是什么意思 threefold axis of symmetry在线中文翻译

threefold axis of symmetry是什么意思，threefold axis of symmetry在线翻译，threefold axis of symmetry中文意思，threefold axis of symmetry的中文翻译，threefold axis of symmetry发音，threefold axis of symmetry例句，threefold axis of symmetry词组短语，threefold axis of symmetry怎么翻译，单词threefold axis of symmetry的意思