【正文】 s decision to meet Brownlow and Rose on London Bridge reveals the symbolic aspect of this bridge in Oliver Twist. Bridges exist to link two places would otherwise be separated by an impassable chasm. The meeting on London Bridge represents the collision of two worlds unlikely ever to e into contactthe idyllic world of Brownlow and Rose, and the atmosphere of degradation in which Nancy lives. On the bridge, Nancy is given the chance to cross over to the better way of life that the others represent, but she rejects that opportunity, and by the time the three have all left the bridge, that possi。and was quite poor enough for your work.”[5](p120)Sikes understands they have not any value in Fagin’s eyes. Sikes, Nancy and other children who services for Fagin, if they cannot do things for him, they are nothing to him. They are only tools serving for Fagin. When Nancy is about to get money from Fagin, she es across Monks. Nancy follows them and overhears their conversation. Fagin notice that Nancy’s face is so pale. Nancy pretends to be alarmed and Fagin does not ask any more about this. Maybe Fagin begin to distrust what the girl says, because he takes so much notice on her from then on.On the night, Nancy tries to leave for London Bridge. Fagin is visiting Sikes, Both Fagin and Sikes notice Nancy is very uneasy. When Fagin departs, he asks that Nancy conduct him downstairs .He whispers to her he will help her leave the brute Sikes if she wants. He hopes to persuade to murder Sikes and bring her new love into his gang. Fagin always make every chance to know others’ information. Thereby he can solidify his control over her.Fagin sends Noah to watch Nancy and knows the details of her meeting with Rose and Mr. Brownlow. Fagin and Noah relate the details of Nancy’s trip. Fagin purposely does not tell Sikes that Nancy insisted that her associates not get into trouble. In a rage, Sikes rushes home and beats Nancy to death while she begs for mercy. The Attitude to Sikes in Different Time When Nancy and Sikes drag Oliver to Fagin’s den, they see some people are hung on gallows. Nancy says to Sikes,“I wouldn’t hurry by, if it was you that was ing out to be hung, the next time eight o’clock struck, Bill, I’d walk round and round the place till I dropped, if the snow was on the ground , and I hadn’t a shawl to cover me,”“And what good would that do? ” inquired the unsentimental Mr. Sikes.[6](P96)It is Nancy’s loyalty to Sikes, but Sikes does not care about it at all. When Sikes falls ill with a fever, Nancy still takes good care of him despite his irritable manner.“Such a number of night ,”said the girl with a touch of woman’s tenderness ,which municated something like sweetness of tone ,even to her voice 。 and Bill was to do this 。 and you’re the wretch that drove me to them long ago 。 social environmentIntroductionCharles Dickens was the greatest representative of English critical realist. Oliver Twist marks the very beginning of Dickens literary life. It directs at the nineteenthcentury English Poor Laws with a bitter invective. As an unknown shorthand reporter of twentyone, with a single tale just published in a magazine, he referred casually to “my proposed novel ” in a way that shows it must in conception and materials have resembled this. But since he knew publication was “hazardous”, writing was deferred while he concentrated his forces (and used some of its matter) on sketches and short stories for various newspapers and periodicals. “I have perhaps the best subject I have ever thought of…. I have thrown my whole heart and soul into Oliver.”[1](p2)That its general purpose was clear in his mind is event from his latterwritten preface: “I wished to show in little Oliver, the principle of Good surviving through every adverse circumstance, and triumphing at last,” [2](p3)The panions among whom he was to be tried were the criminals’ miserable world in London. The book was known to Dickens by close observation and various experience.In Oliver Twist, Dickens portrays all kinds of characters in London, especially those who live in underworld, such as Oliver Twist, Fagin, Bill Sikes, the Artful Doger and Nancy. A major concern of Oliver Twist is the question of whether or not a bad environment can irrevocably poison someone’s character and soul. As the novel progresses, the character who best illustrates the contradictory issues brought up by that question is Nancy. As a child of streets, Nancy has been a thief and drinks to excess. The narrator’s reference to her “free and agreeable…manners” indicates that she is a prostitute. She is immersed in the vices condemned by her society, but she also mits perhaps the most notable act in the novel when she sacrifices her own life in order to protect Oliver. Nancy has a double character, with “soul of goodness in things of evil.” Nancy’s moral plexity is unique among the major characters in Oliver Twist. The novel is full of characters who are all good and can barely prehend evil, such as Oliver, Rose, And Brownlow, and characters who are all evil and barely prehend good, such as Fagin, Sikes, and Monks. Only Nancy prehends and is capable of both good and evil. Her ultimate choice to do good at a great personal cost is a strong argument in favor of the incorruptibility of basic goodness, no matter how many environmental obstacles it may face. She is a good girl, though she grows up in a evil world.There are many researches on Oliver Twist, this poor little boy. This paper is mainly concerned on Nancy. Oliver does not know anything of evil, and he speaks standardized English, though he grows up in a disguised kind society. Comparing with Oliver Twist, Nancy is true. Nancy is different, and she prehends virtue and evil. By concrete description, it reflects the darkness of that society and the plexity of human nature.1Nancy’s Double C