比例应为浮点型变量（或常量）。

The scale should be afloat-type variable (or constant).

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浮点型数字和长变量类型的定义是有差异的。

There are differences in the definition of floating-point Numbers and long variable types.

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支持的变量包括整型、浮点型的数字、字符串、数组和对象。

Supported variables include integers, floating point Numbers, strings, arrays, and objects.

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