- 
				           		着重论述了单黑洞—吸积盘进动模型或盘致进动模型;
						        					            	 The single black hole-accretion disk precession model or disk-driven precession model is discussed carefully;
								    										 
								    				            	 youdao 
- 
				           		着重论述了单黑洞—吸积盘进动模型或盘致进动模型;
						        					            	 The single black hole-accretion disk precession model or disk-driven precession model is discussed carefully;
								    										 
								    				            	 youdao