The results showed that the change of each parameter was obvious in the earlier aging period and such change was gentle in late aging period.

结果表明，陈酿前期各参数变化较明显，而后都朝着平缓的趋势变化；

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Into the 21st century, our country is entering a "housing aging" period, the time of a comprehensive renovation of old housing has come.

进入21世纪以来，我国正步入一个“住宅高龄化”阶段，全面地对旧住宅进行更新改造的时期已经到来。

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Earlier this week, truck manufacturer Paccar ( PCAR) said its customers are choosing to hold onto aging trucks for a longer period of time, rather than replace them.

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The cellular telecommunications industry is entering a period of transition from aging, analog-era transmission technology to high-speed "third-generation" (3G) mobile networks.

CNN: Stuck On the Runway

Whether any company flourishes or fails in the volatile period of transition between an aging Second Industrial Revolution and the emerging Third Industrial Revolution will depend, to a great extent, on their energy costs.

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