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1·They are each building a racial character and a culture which is an impressive contribution to human progress.

他们各自都建立了自己的民族性格和文化，这对人类进步是一种令人难忘的贡献。

2·It broke a path for American protest novel, successfully portrayed the character, Bigger Thomas, and mercilessly exposed the racial discrimination existing then in American society.

它在美国文学中占有非常重要的地位，开创了美国文学中抗议小说的先河，成功地塑造了别格。