Reason, on the other hand, is a mere principle or potential order, on which indeed we may cometo reflect but which exists in us ideally only, without variation or stress of any kind.

另一方面，理性知识一种原则或者是潜在的秩序，我们确实可以在此基础上存在于我们心中，没有种种变化，或任何压力。

youdao

Variation in the wording and order of questions, for example, may lead to somewhat different results.

比如，措辞的不同，问题顺序对换，都会导致不同的结果。

youdao

First-order change is a variation in the way processes and procedures have been done in a given system, leaving the system itself relatively unchanged.

l在过程和步骤已经确定的给定系统中，一阶变化是个变异，它使系统本身相对的不变。

youdao

Rather, they should offer a variation that is an order of magnitude more ambitious and ask why the latter cannot be accomplished.

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The short answer is: calling into question whether the processes of random variation and natural selection are all we really need in order to understand the origin of species.

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