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				           		Now, if you wanted the unit normal vector to compute flux, then you would just scale this guy down to unit length, OK?
						        										 	
						        					            	 如果想用单位法向量来计算通量,还得先把它标准化到单位长度?
								    				            	 youdao 
- 
				           		Now, if you wanted the unit normal vector to compute flux, then you would just scale this guy down to unit length, OK?
						        										 	
						        					            	 如果想用单位法向量来计算通量,还得先把它标准化到单位长度?
								    				            	 youdao