为什么1901年在澳大利亚的历史上是重要的一年？

Why is the year 1901 important in the history of Australia?

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我澳大利亚的朋友说中国历史很难理解。

My friends in Australia said that Chinese history was very hard to understand .

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我澳大利亚的朋友说中国历史很难理解。

My friends in Australia said that Chinesehistory was very hard to understand.

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我澳大利亚的朋友们说中国的历史很难理解。

My friends in Australia said that Chinese history was very hard to understand.

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我澳大利亚的朋友们说中国的历史很难理解。

My friends in Australia said that Chinese history was very hard to understand.

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