中国文明博大精深、源远流长，为人类文明进步做出了巨大贡献。
The Chinese civilization is extensive and profound and has a long history, and it has contributed tremendously to the progress of human civilization.
成千上万的中国劳工为美国第一条横贯大陆铁路的建设做出了巨大贡献；他们的巨大努力值得记录在美国历史上。
Thousands of Chinese laborers contributed greatly to the construction of America's first transcontinental railroad, and their intense efforts deserve a page in American history.
成千上万的中国劳工为美国第一条横贯大陆铁路的建设做出了巨大贡献；他们的巨大努力值得记录在美国历史上。
Thousands of Chinese laborers for America's first transcontinental railway construction made great contributions, Their efforts are worthy of great record in American history.
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