The main result is:if such a group contains the orientation-preserving Euclidean group in R~2,then it is a subgroup of the orientation-preserving Euclidean goup in R~3.是什么意思_The main result is:if such a group contains the orientation-preserving Euclidean group in R~2,then it is a subgroup of the orientation-preserving Euclidean goup in R~3.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句