The left and right values in the macro must be of the same type—float or double.

这个宏中的左值和右值必须是相同类型的 — 即要么是 float，要么是 double。

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The memory space of a float or double value is limited, so some values cannot be represented.

浮点或者双精度浮点的内存空间是限定了的，所以某些值不能被表示。

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Recall from previous articles that Scala treats functions as values, just as it does any other value in the language, like Int, Float, or Double.

回忆前几期文章，Scala将函数作为值处理，就像处理语言中的其他值一样，例如Int、Float或Double。

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