求翻译：经过一百多年的演进，美国在法律渊源上形成成文法和判例法并重的双元化格局，二者相互影响、相互促进、相互制衡，共同促进美国法的发展。是什么意思？

After one hundred years of evolution, the United States in the legal sources on the formation of the dual of the pattern of both statutes and case law, the two influence each other, mutual promotion and mutual checks and balances, and jointly promote the development of American law.

After more than 100 years of evolution, and sources of law in the United States on a statutory and case law and the double- $2, and the pattern of interaction and mutual promotion, checks and balances, and they will work together to promote the development of the law the United States.

After more than 100 years evolution, US forms the binary cell pattern in the legal origin which the written law and the case-law pay equal attention to, the two affect mutually, promotes, to keep in balance mutually mutually, promotes US's method development together.

After more than 100 years of evolution, United States on the legal origin of formation of statutory law and case law and dual pattern, they influence each other and promote each other, mutual checks and balances to promote the United States law of development.

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