而可变精度粗糙集作为对经典粗糙集理论的扩展，体现了等价类与集合的重叠度程度上的差别。

As the extension of rough set, variable precision rough set reflects the difference of degrees of overlap of kinds and sets.

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决定可以基于价格、送货日期、售后服务或是任何其他可变因素而做出。

Decisions could be made on the basis of price, delivery dates, after-sales service or any other variable.

《柯林斯英汉双解大词典》

造成这种速度优势的原因是数组是固定大小的，而默认的 PHP 数组是可变大小的，并且不允许非数值型索引。

This speedup is due to the fact that the array is a fixed size, not a variable-sized one like the default PHP one is, and that non-numeric indexes are not allowed.

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These things run for variable amounts of time because they take input, a list of size of some amount.

而这一段的执行时间是可变的,因为它们需要输入一个包含一些元素的列表。

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