规范中没有规定标识的有序数值，但它规定了将保持顺序。
The specification does not dictate the ordinal value an identifier will have, but it does dictate that the order will be preserved.
现有必要对一个有序数据集合重复进行一系列有序操作组成的运算。
It is necessary to perform an computation repeatedly, composed of a series of ordered operations on a set of ordered data.
该枚举类型的values方法返回这种类型的不同值的有序数组。
The values method of the enumerated type returns an ordered array of the different values of that type.
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