Jazz probably had its roots in the 19 th century.

爵士乐或许真正源于19世纪。

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In the 19 th century waterpower was widely utilized to generate electricity.

在19世纪人们大规模使用水力来发电。

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In the 19 th century, Afanasi Afanasyevich Fet, an outstanding Russian poet, wrote many beautiful lyrics.

19世纪的杰出的俄罗斯诗人费特写下了很多优美的抒情诗。

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