v. 时刻困扰( obsess的第三人称单数 ); 缠住; 使痴迷; 使迷恋

n a major river of western Siberia; flows generally northward and westward to the Gulf of Ob and the Kara Sea

n the branch of medicine dealing with childbirth and care of the mother

v haunt like a ghost; pursue

v be preoccupied with something