The key is to gradually raise this baseline.

关键问题在于逐步提高这一底线。

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As demand increases, airlines are likely to gradually raise airfare rates, experts say.

因为专家认为，随着需求的增加，航空公司可能将逐渐抬升票价。

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As the opening speaker began speaking about stress and burnout, only gradually did they raise their eyes to the podium.

只有当第一个演讲者开始谈论压力和它的毁灭性后果时，他们才陆续将眼光集中到演讲台上。

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But their most provocative proposal would gradually raise the Medicare eligibility age from 65 to 67.

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We should gradually raise revenues and trim benefits in a way that establishes long-term solvency without hurting vulnerable seniors.

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Left out by the House were controversial Medicare proposals approved by senators that would raise Medicare eligibility gradually from age 65 to 67 by 2027.

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