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

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。

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The empty shell of a snail or clam may be left behind, and if it is sufficiently durable and resistant to dissolution, it may remain basically unchanged for a long period of time.

蜗牛或蛤蜊的空壳可能会被留下来，如果足够持久和抗溶解，它可能会在很长一段时间内基本保持不变。

youdao

We're a traditional British restaurant so there are some staples that will remain essentially unchanged.

我们是一家传统的英国餐馆，所以有些主菜基本上不会改变。

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They say levels of a protein called Shh need to remain largely unchanged in a developing fetus for the palate to develop correctly.

VOA: special.2009.12.22

And when a compound is decomposed, the atoms are recovered unchanged.

当一个化合物被分解的时候，原子有恢复原来未曾改变的面貌。

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Inventory levels are at a reasonable 6.9 month level, unchanged from a year ago.

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This might be a good thing, especially since it has remained all but unchanged since a year ago.

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Benetton's sales were stuck at 2 billion euros in 2011, unchanged from a decade earlier.

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