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				           		该文证明了这样抽取的代数特征具有一些重要的代数和几何不变性。
						        					            	 This paper proved that this algebraic feature has some important properties of algebraic and geometric invariance.
								    										 
								    				            	 youdao 
- 
				           		该文证明了这样抽取的代数特征具有一些重要的代数和几何不变性。
						        					            	 This paper proved that this algebraic feature has some important properties of algebraic and geometric invariance.
								    										 
								    				            	 youdao