We need to ensure a smooth transition between the old system and the new one.

我们得确保新旧制度间的平稳过渡。

《牛津词典》

But a smooth transition is another matter.

但能否平稳过渡是另一回事。

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If you plan in advance, you can avoid problems and ensure a smooth transition.

如果提前计划，可以避免出现问题，确保顺利实现转换。

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Precise tuning between the speaker drivers ensures a smooth transition between low- to mid- and high-frequencies.

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Treasury Secretary Henry Paulson said Thursday that he looks forward to a smooth transition.

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Investigators found the homes didn't always do what was needed to ensure a smooth transition.

WSJ: Medicare paid $5.1B for poor nursing home care