它们是中国文化的发源地。

They are the birthplaces of Chinese culture.

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黄河是中国文化的发源地。

Huanghe is the cradle of Chinese culture.

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首先，黄色是一种意味深长的颜色，黄河是中国的母亲河，是中国文化的发源地。

First, yellow is a meaningful color. The yellow River is China's Mother River and the cradle of Chinese civilization.

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首先，黄色是一种意味深长的颜色，黄河是中国的母亲河，是中国文化的发源地。

First, yellow is a meaningful color. The yellow River is China's Mother River and the cradle of Chinese civilization.

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