美国剧作家田纳西·威廉斯作品中的布兰奇,阿尔玛,切恩斯·韦恩,布雷克等人物,在社会和家庭伦理的双重维度都深陷伦理身份困境。田纳西的成名作《玻璃动物园》中的汤姆也受困于自己的多重伦理身份。本文尝试从文学伦理学角度来探析造成汤姆多重伦理身份的原因,他为平衡各个身份所做出的努力,以及此过程中艰难的伦理抉择。 The characters of Blanche, Alma, Cheyenne Wayne, Blake and others in American playwright Tennessee Williams are all deeply trapped in the ethical dilemma in the dual dimensions of social and family ethics. Tom, of the famous Tennessee glass zoo, is also stuck with his multiple ethical identity. This article attempts to probe into the causes of Tom’s multiple ethical identities from the perspective of ethics of literature, his efforts to balance various identities and the difficult ethical choices in the process.