This information is important as you analyze the reference classes.

这些信息对于您分析引用类是很重要的。

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The Reference classes can be useful if used for the right situations.

如果使用得当，引用类还是很有用的。

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Each of the reference classes has a get method, and the ReferenceQueue class has a poll method.

每个引用类都有一个get方法，而Reference Queue类有一个poll方法。

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Consider focusing on the YTD performance category as an initial reference point to identify underperforming asset classes for now.

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As a point of reference, there is something called the Callahan Periodic Table that lays out which asset classes were the best and worst for each year going back to 1992.

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