尽管大多数用户努力尝试保持阶段化(staging)和生产环境同步，但一个更改的引入仍然不可避免，而且这种更改通常不会被注意到。

While most users diligently attempt to keep their staging and production environments in sync, inevitably a change is introduced that ultimately goes unnoticed.

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我们在此阶段应保持相当广泛的讨论。

We shall at this stage keep the discussion fairly general.

《牛津词典》

马是分阶段进化的，每一阶段都几乎保持了数百万年的不变，而最终被一种独特的新型马所取代。

Horses evolved in discrete steps, each of which persisted almost unchanged for millions of years and was eventually replaced by a distinctive newer model.

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