In the middle of the 19 th century, gold was discovered in California on the west coast of the United States.

19世纪中叶，位于美国西海岸的加利福尼亚洲发现了黄金。

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In the middle of the 19 th century, gold was discovered in California on the west coast of the United States.

19世纪中叶，位于美国西海岸的加利福尼亚洲发现了黄金。

youdao